I don't think we have to feel tremendous feelings of love and affection for our parents - sometimes not even a trickle of those emotions. We are commanded to honor our father and mother. You had her in your home; I'm sure you were a good hostess and let a lot of her junk slide. That is honoring your mother.
As someone who had a mother whose been dead almost nine years, I still carry the fallout from the sadistic stuff she pulled on me when I was a kid. Whew! I wouldn't have wished her on my own worst enemy. I eventually cut all ties with her. I've never regretted it.
I'm sorry you had to be put through the wringer by her, but you have insight to see her for what she is. Just by talking about it, you're allowing yourself to detach.