Good for you, Helen. That's a boundary too.
In case you're still catching up on this post, I had a response to
Maybe I need to reclarify my boundaries to myself. I still feel guilt sometimes. I think it is probably better to be angry then guilty.
I think the anger is useful if it's like a force that can unplug what's beneath it so that can flow through you and eventually empty. What anger's usually covering is hurt or fear. It sounds to me as though your mother is mostly hurtful...
The gift in the future will be when you experience a choice that transcends either anger or guilt, so you don't think in terms of having to choose between those two. Sometimes determined people (and you sure sound determined) can get past either anger or guilt or hurt or grief and find themselves in a place where the dominating emotion is more like compassion.
Cool compassion. Not hot with connection and yearning but just, from your safe distance, sorrow for your mother at all that she has missed, and pity for the forces she no doubt experienced (or inherited in her genes, or both) -- that created her warpedness.
When you're there, it will be all so beyond personal, it will neither hurt nor enrage nor frighten you. It will just be the way it is, or the way she was, and you will accept it all on its own terms.
luck,
Hops