I hadn't seen this thread before so thank you for bumping it. I totally understand a lot of what you said, as I too have people I would like to say sorry to. For 18 years my mother brainwashed me into thinking she was the perfect person. She controlled everything I did, and it took a long time for me to stop being what she created. There are times when I say or do what she trained me to do, but I recognise it and take a step back and behave like a decent person instead.
Interestingly as a young child I knew her way was wrong, and sometimes said things that showed that, and those are my earliest memories. Unfortunately those comments meant she increased her control and brainwashing so as a teenager I was what she wanted me to be. Now I celebrate being the complete opposite to her.
I'm sure there are many reasons why mothers behave as they do. In my case my mother was a spoilt only child whose mother positively encouraged her to be the person she was. In return my mother claimed she'd had the perfect childhood with the perfect mother!