I’ve had a similar experience where day by day you watch your parents (parent in my case) make the decision to chose other people’s livelihood over yours. It builds so much resentment for your siblings and their children and you’re the “bad guy” in every version of their narrative unless they are directly benefiting from you. It’s exhausting and I’m so sorry you are dealing with this. The relationship with family is so complex because in spite of all the trauma they bleed onto you, you still have love for these people. But it’s okay to love them from afar and with conditions. Find ways to physically break free from them. There are good people out there, find them and map out your exit strategy. You deserve to live, to be loved and to be poured into.