I’ve been dealing with similar with my mum for the past few months. It’s so confusing, I’m struggling to work through it.
She caused so much pain in my life, both physical and emotional, and I no doubt have long lasting issues because of her. She left and my dad raised me but had his own issues, he committed suicide and on that very day she decided to cut contact with me because I wouldn’t drive the 2 hour round trip from the hospital to her house to deliver her some cigarettes (seriously).
That was 10 years ago. Since then I felt more peace than I ever had. I worked things through and almost forgot about her, we never spoke again and I felt much better for it.
Then I got word that she had died. I was numb for a few weeks and have been confused since. I didn’t go to the funeral, I don’t even know if she had one.
Some people expected me to mourn her, others made light of the situation because she had been so awful to me and others that they were glad she’d died.
I don’t know how I feel. Whenever I’m upset, it’s for something I never had. It just feels like a waste. A waste of a parent, a childhood, a waste of emotions and time. And like you OP I wanted answers but that will never happen.