Every parent, if they're honest, will admit that a particular stage of parenthood was especially challenging. For me, it wasn't infancy. It was hardest for me when the kids were in that in-between stage.
Most of us marry with the best of intentions. Sometimes that just doesn't work out. We shouldn't slap a #fail label on people who divorce. Let's have faith that they'll do things better the next time -- or maybe the time after that.
I do not believe that couples ought to stay together for the sake of the children. Marriage is not a prison sentence; children are not your jailers. But that does not mean that divorce does not scar kids.