Always being put down..........advice?

Stand up for yourself. I mean that in the most respectful way... If u do people will respect u. For example when ur sis said "what now!" u could have responded with "I was going to say you looked good but whatever since ur gonna be that way!" and when ur parents are slamming what u enjoy doing tell them That u don't care what they think(about the topic @ hand) and that you enjoy doing it and support would be nice! I was in ur place my whole family played sports and I didn't I played the piano and violin my dad would say u would have been a great baseball player. So I would respond with dad... U don't support me like a good parent should and i can't take it... So l8r I played a song and he was really proud. Do what I did and it usually works involve ur family and friends in what u enjoy!! Good luck ;)