I don’t hate any of my parents (though I spent a lot of time thinking I hated my biological father because I grew up without him in my life). I have a fabulous step-father (who was only married to my mom for a few years), and I could never think badly of him. Just saw him yesterday, as a matter of fact.
Now, my mother is a different story. Because of issues in our past, and the fact that she has Borderline Personality Disorder, I have cut her completely out of my life. As I said, I don’t hate her. She is just extremely bad for my mental health, and it came down to either continuing to protect her feelings or protecting my sanity. I finally chose in my own favor. It’s been over 5 years since I’ve had any contact with her and it was the single best decision I ever made in relation to the quality of my life.
Background story: I was sexually abused by an uncle (one of her brothers) for the first 13 years of my life. She knew about it but never called the police, never did much to protect me, never moved us away from him, never barred him from our house, and never even stopped being friends with him. Even when I was an adult, they continued to hang out together, see movies together, etc. She never understood how damaging all of this was to me. I spent several years going the “set strong boundaries” route, but she routinely ignored my boundaries. I finally felt I had no choice but to get her out of my life altogether.
Edit: I forgot to mention my children. Having them definitely reinforced my feelings about my mother’s parenting. I could not imagine allowing my children to be harmed the way I was, and couldn’t fathom how she didn’t protect me from that harm.
When I had kids, it also brought a whole new (bad) dimension to my relationship with my mom, because she couldn’t understand why I wouldn’t allow her to babysit them, even after I told her point blank that she has extremely poor judgment and that I couldn’t risk them being hurt by it. In spite of that, when she moved far away, she continually asked that we send them to her house for vacations (sans parents), and couldn’t understand why we wouldn’t allow that, either. Her denial seemed to grow along with the children. Very, very weird.