Learning to address anger, needn't be about them, specifically. Sounds like there was a tremendous amount of dysfunction, at the very least. Dysfunction can wreak havoc on individuals.
Forgiveness, can be something that you do, for yourself, for your wellness, for your own peace of mind. Doesn't mean that you'd need to increase nor decrease contact.
No need to minimize your experience, either, you are just as worthy of being here, as anyone else.