If those "Why I'm Quitting Facebook" editorials haven't convinced you, there's now scientifically grounded evidence of Facebook (dis)Likes.

According to newly released data from the American Customer Satisfaction Index, Facebook scored a lowly 61 out of 100 in customer satisfaction among active users, an 8-point drop from 2011. That's the fourth-lowest score among all 230 companies surveyed in the index and the lowest among "e-business" (Internet) companies. Of the seven social networks included in the study, Facebook's customer satisfaction polled lowest.

A dismal customer service rating might just be a growing pain that any large social network has to contend with. Take Twitter and LinkedIn, which fared only slightly better with 64 and 63, respectively. Both also ranked among the bottom 10 of all companies polled overall. Newcomer Pinterest received a score of 69, while YouTube had 73. Surprisingly, Google+ topped all these with 78, tying with Wikipedia, which for the purposes of the customer satisfaction index was categorized as a social media site. The ACSI, once affiliated with the University of Michigan, is now a private company based in Ann Arbor.

Larry Freed, CEO of analytics firm ForeSee, which partnered with the ACSI in Tuesday's study, said he sees three big reasons for the discontent: privacy oversights, a frequently changing user interface, and ads. The first two are things the company can address directly, though ads, the main revenue source, are trickier. Freed said 61 percent of users say they pay no attention to Facebook advertising.

With Twitter and LinkedIn also scoring low in ACSI's survey, should we assume that customer dissatisfaction is a problem in social media? In one sense, yes.

"When you look at the broad category, people are still learning the roles of these social media sites," Freed said. Sites like Twitter and LinkedIn have niche audiences of happy power users. But many more casual members may become frustrated by unfamiliar features, etiquettes and user interfaces and can bring down satisfaction scores.

"That broader audience is what they need to reach in order to get the scale that they want," Freed said. Clearly, to get a big and profitable Facebook-sized audience, other networks need to make their services easier for newcomers. However, a large market share does not guarantee happy users, something Facebook knows all too well.

Facebook's stranglehold on many types of social networking in the U.S. and other countries gives Facebook power to get away with changes that irk users, like the maligned transition to the Facebook Timeline and the half-baked decision to replace members' preferred email with an @facebook.com address on their profiles.

“We care deeply about the experience people have on Facebook and that's why we're so focused on building and improving the products we offer," a Facebook representative told The Huffington Post. "Giving people the means to interact with the people when they want, where they want and how they want is the most meaningful way for us to make our relationship with people even stronger."

Despite published accounts that say Google+ is becoming a "ghost town.", why all the the ACSI satisfaction? The index compiled its rankings by surveying active members of each site -- those who've used it at least once in the past three months. Only the most satisfied users would stay with Google+. Facebook, on the other hand, is hard to let go of, since it's such an integral part of maintaining friendships today. Indeed, 58 percent of Google+ users report checking their Facebook account in the past week, according to Freed.

“There’s some truth that the only people using it are people most satisfied," Freed said of Google+. "Facebook has a much broader audience."

Unlike a power company or cable TV provider, all it takes to end a social networking account is a few clicks on a keyboard. Facebook has built a massive network of members that keeps people logging back in. But that doesn't ensure it will stick around forever. Just ask Myspace.

Earlier on HuffPost:

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  • Timeline

    Let's face it. Timeline succeeds in one aspect: making it easier for your employer, your girlfriend or that guy you knew in high school to stalk you. The new profile page allows your friends to view any and all status updates, comments and uploads from a specific year and month. The only way around it is to spend a few hours -- or longer, depending how long you've been on Facebook -- going through your timeline with a fine-tooth comb and hiding individual posts.

  • News Feed

    We've gotten used to it by now, but in 2006 the stream of status updates and comments was hated with a passion. <a href="http://online.wsj.com/article/SB10001424052702303877604577382050951989954.html" target="_hplink">Hundreds of thousands of Facebook users</a> protested its implementation, according to the Wall Street Journal.

  • Pokes

    We all remember the poke. The curious point of contact that could imply anything from "hey, I'm bored" to "I like, like you." The mystery was in the meaning. Suprisingly, this long-time Facebook feature still exists! It's just hidden behind the settings drop-down menu on someone's timeline. (<a href="http://www.flickr.com/photos/ainnicer1971/3234671337/" target="_hplink">Photo via Flickr</a>, user: annavanna)

  • Game Invitations

    We don't mind that there are games on Facebook, but what's annoying is the constant stream of invitations to our Facebook inboxes. No, we don't want to play "BINGO Blitz" or "Marvel: Avengers Alliance." One thing we do love: streamline notifications. This setting frees up your inbox by telling Facebook to send you summary emails, rather than individual notifications. Finally! More room for those Groupon notices and LinkedIn requests. To turn on streamlined notifications, visit your <a href="https://www.facebook.com/settings" target="_hplink">Account Settings</a>, click on "Notifications" in the upper lef-hand nav bar, and select the "Email frequency" option at the top of that page. From this page, you can also scroll down to "Other options from Facebook" and modify what kind of notifications you get from Facebook.

  • Ticker

    You know that real-time update of every move every single one of your friends makes? It's in the right corner above Facebook chat. Watching your friends' up-to-the-second Facebook movements are a little creepy and at most times, completely unnecessary. Fortunately, depending on your browser, you hide the ticker by shrinking the screen.

  • Check-Ins

    For many, this feature seemed like a stalker's dream come true. Broadcasting your location to close friends is one thing, but your entire network? Just creepy. Note, however, that <a href="https://www.facebook.com/help/location/privacy" target="_hplink">Facebook has built a ton of privacy options into this feature</a> to let you control what kind of information Facebook is broadcasting about you. (<a href="http://www.flickr.com/photos/channelship/5011336845/" target="_hplink">Photo via Flickr</a>, Channelship Web Agency)

  • Constant Game Updates

    We don't mind games on Facebook. By all means, get your game on. But when we see every single move you play, that's when that indifference turns to irritation. If you find your News Feed clogged with useless stories, you can choose to see only important updates (or no updates at all) from certain people. Just click the drop-down menu on posts you don't like to modify the News Feed settings for that person.

  • Facebook Chat

    Back when Facebook Chat was shiny and new, you were either online or off. This restricted you from hiding from "friends" you didn't want to talk to, while chatting with the friends you do. Now, there's the option to hide certain people from chat. (Just click the gear icon next to your Facebook Chat window in the bottom right hand of Facebook. Then, click "advanced settings" to select which of your Facebook contacts you'd rather not chat with.) (<a href="http://www.flickr.com/photos/terrio/4920679942/" target="_hplink">Photo via Flickr</a>, Terri Oda)

  • Registrations

    First it was limited to a few elite universities, then high schools were invited and, finally, Facebook registration was opened to everyone with an email address. Each iterative opening of the registration pool was, for the most part, <a href="http://techcrunch.com/2006/09/26/facebook-just-launched-open-registrations/" target="_hplink">received negatively by current Facebook users</a> who valued the exclusivity of the social networking site.