I learned a long time ago that people in my position are on their own, but, you know something, that's OK because we're made of a lot more than other people think. We are strong enough to survive in a life that is against us and the people we let into our lives are privileged, it's not the other way around.
I do not make an effort to have other people conform to my life, but this is not the path everyone can or should take. In the end, each of us must decide what we want out of life and what is important because we are only here for a short time.
I may feel that the OP would be better off without her daughter, but, clearly, that's not in her best interest. It is not what she wants and not everyone is the same. So, I have to put my own feelings aside and think of what is best for her.
I am sorry for what you are going through, but it is part of what people in your position go through and there is no one size fits all answer. You have to take each situation and deal with it. I hope things get better for you.