Has anyone forgiven the alienating parent?

Like me, many of you have deep anger and resentment against the other parent. These feelings are totally justified. However, I am struggling with managing these feelings. It consumes me at times. It’s hard to focus at work and sometimes it’s hard to simple chores done because I am thinking about too much. I’ve gone to therapy but find it helps only temporarily.

I would think a lasting solution is to forgive my ex. But I can’t get myself to do it. Has anyone been able to do it? If not, how have you managed emotions so that you can function well?

Luckily, I still see my kid almost 50-50, but only after obscenely expensive 8 year custody battle in which I was reported for and cleared of child abuse 7 times. Although I should be relieved we finally reached a legal settlement, I am bitter. She wasn’t called out for perpetuating those child abuse charges and the settlement we reach was essentially the same I proposed years ago. It feels unfair. I should get over it but I have been able to.

Any advice from someone who has successfully managed their negative emotions for the other parent?