Hi Wellitried

It sounds like the person that brought you anguish in your life, is the person who is now providing a space for you to live, but what she gets out of the deal is to use you for an emotional punching bag, so you feel trapped? Did I get any of that sort of somewhat accurate?
It sounds like a really difficult place for you to be.
I hope you get a lead on a job soon. There are all the usual ways of jobhunting. But there are also organizations that can assist with jobhunting, as well as with skillbuilding, to open up new opportunities. The good thing is that those organizations are away from, and outside of the house, so you would have some space away from her, while working on something for yourself.
As hard as it is, try to notice something small to be joyful about - some beautiful Christmas lights, or drifting snowflakes, or a bird perched and resting in a tree, or a walk in the park. It sounds like life has been difficult for you, and I am sorry for that. But with all that negative stuff, it is important to still be able to notice a joyful moment each day, even if it is very small.
Is it possible to do some jobhunting away from the house to reduce contact with her?