Hey JJacks-
Anger is a normal response to abuse and disrespect, and a stage of grieving and detaching, so the keys are don't make yourself wrong for feeling it, and don't do anything out of anger that will cause damage or make the situation worse. And it's a stage, it will pass.
I'm trying to figure out a healthy way to release it. So far my plan is to try to get some of it out through exercise/music, but these are still just temporary releases.
Vigorous exercise is good, you can burn up a lot of anger that way, you'll sleep better, and you'll get in shape too! Beating the crap out of a pillow works too, in the short term, and when the air in the room is full of feathers you'll know rage has spoken. And my fave lately is meditation, which is no more than sitting and just being instead of doing, we're human beings not human doings after all, and is a simple as sitting quietly, breathing deeply and slowly, and watching your emotions float through while being off to the side a little; you're not your emotions, you're something much bigger, and just watching them float through without feeling them, and then thanking them for their message, is powerful. And that has benefits beyond detaching from the ex, it's a useful life skill.
Take care of you!
