Should I cut off my family?

They were previously abusive, we have a very distant relationship now. I have asking for support the past few days and they are hesitant as always. I can’t rely on them and it feels like a toxic relationship. I want a lot more support from them than they are willing to provide. It is painful. I have messaged them saying that I would like more support from them and if they can’t provide that I will cut them off. I am trying to reduce stress in my life. I now have support workers (I am autistic) who can maybe meet my needs instead. It is painful to keep wondering when they will support me. I feel like I am never enough and it is like an open wound. I would not lose anything to cut them off but I don’t know if I would have anything to gain from that. Would I feel less pain? Advice is much appreciated.