whatis I recall a thread about sleeping on the floor, was that a while ago? Or am I confusing a more recent thread?
My love, the dc are a credit to you, what you've achieved is amazing, given the situation you are in.
The situation with your mother is nothing new, not for you, and not for many of us.
I recall being told that my DM had always let me down, gone out of her way to hurt/neglect me or negate my feelings.
I was then told that it was (kinda) my own stupid fault for thinking that of all the chances i'd given her, all the times where she'd done sweet FA to help, this one time would be the time she'd break with decades of traditional and be there for me, or be the mother i'd like her to be.
Harsh to hear, and it hurt to hear it said to me, but it was true.
Your dm will never be the dm you deserve her to be, so the best thing for you is to give up expecting her to be.
Have you got any RL support? Would you consider counselling?