I stopped letting my mother control my life when I was in my mid twenties. Getting divorced from first H, she was upset for herself and the embarrassment it would cause rather than what I was going through. We got the whole, mouth-soap wash, belt and jandal thing as kids and remember vividly being told on one occasion if I went to the social welfare she'd make it worth her while. Was also kicked out of the house at 17 for going on a ski trip with my older brother because he didn't get his car fixed, my bags were packed when we got back! (he was allowed to stay). Now I'm the one who keeps in contact and am stable person with a stable life, whereas my brother is an alcoholic, drug-addled drifter (I love him to bits though) and he's still the golden child.
She was sick as a child and spoilt rotten, I think this had a lot to do with her actions as an adult. If she didn't get her own way, fell into long silences, bad moods etc... She has also managed to alienate/cutoff all of her 12 bros/sis and stepdaughters, plus any friends who disagreed with her. For her own sake I wish she'd just grow up. The different ways she treated her children I can only assume were down to our fathers, she was in love with my DB's father, but mine was abusive to her for the short time they were together, and seemed to tint her view of me.
Now I just get on with my life, living it how I choose and if she doesn't like it too bad.
She has got a lot better in older age. But last crap mothering example: DH and I spent a considerable sum going home to support her getting remarried in Dec, she didn't even send an email acknowledging our second anniversary in Feb.
I do worry about the crapness being passed on to me and visiting it upon my LO due in June, but have to rely on my own strength and DH not to allow it to happen.