Hey FF, sorry to read your story. I relate very strongly. For similar reasons you mention, I went No Contact with my mother.
At first I was sick with worry over it, but it gradually became an enormous relief. A big weight lifted off me.
I was no contact for many years. Eventually I had a call that she was in hospital dying so, more to support my brother than for her sake, I went along to see her.
Spent twenty minutes with her shouting abuse!
No change there then! She died next day. At peace.