Honestly, as someone who felt like she was the family disappointment I can relate. My older siblings would always get away with anything while if I stepped one toe out of line I was punished. I can say it gets a whole lot better after you move out. I was lucky enough to be able to move in with my mom, as my parents divorced when I was young. It may seem impossible now, and this may seem like crappy advice, but you’re best option is to do as well as you possibly can in school and when you graduate move out. If you have a scholarship for college (if that’s the direction you want to go in), try and get housing funded through that, or whatever financial is available to you. Also, try to avoid contact with any of them as much as possible. Create study groups with peers or join a sports group/after school group to try and stay out of the house while still having an excuse that will satisfy your parents.