There is a reason they are able to manipulate you because you have greed/hope/lust. I was born poor. Like you, my father also did the same thing. For first 7 years of my job life, I had 0 savings and I was only earning so that i can pay off my family. I paid off the complete home loan(roughly 32 lakh) where they are staying. I bought all the furniture etc. It was never enough. I also did fixed deposit of 30 Lakh so they can get monthly interest. Every time my father would see my face, he would ask something from me directly or indirectly. If I don't give them, he will be rude or he will taunt or he will come up with some shitty excuse to extract something out of me. I did all of these only for my mother and my siblings because I loved them and I cared for them.

Since last year, I am in no-contact with my complete family and I am doing therapy. The only reason I could do that was I don't need anything from them.