If everything is as you say, fuck your family. They sound horrible (excluding your sister). I can almost guarantee that your sister will be the only worthy relationship to hold onto. I remember making excuses for my mother when I was your age. It all changed when I had a kid, and realized that I could never treat them the way I was treated. If you become a parent you’ll see what I mean. But my heart goes out to you, not being able to have trust in your own home with your own family is hurtful as hell to say the least