When you have an ex who is not equally committed to doing what's best for your children, don't expect yourself to make up for that. It's simply a loss that you're not responsible for. Do your best, but don't expect perfection from yourself.
Much of my treatment is aimed at helping patients learn how to override their brain's survival reactions and seize control of their emotions. I explain to people what they can do to control how their brain reacts. So does a person get a grip over powerful emotions?
You are 3. But you are only 3. You are testing and trying and fighting and questioning. You are Batman and Buzz Lightyear and a friend of the ducks. You are ours and you are perfect and you are maddening, all at the same time.