What to do to be free from parents and their gaslighting?

I am always the "good child", the "golden child", but my family is hella toxic. My parents have no expectations from my sister, and she also hardly gives a F about it. I am the one constantly thinking about my parents opinions, their expectations, family problems, financial problems etc. But what did I get? Nothing. I just get bare minimum from my parents cuz that's what they can do, but they have all sorts of expectations that I will earn a lot, take care of them in future etc. If I say something back, all I get is gaslighting. They have "given up" on my sister, cuz she doesnt give a F, why not give up on me? Why all expectations from me and I cannot expect anything from them. I am 22 now, and I think I wasted my past 4 years just because of this tight grip of my parents on my psyche. I want to be free.