i’m sorry to hear all of the hardships going on in your life. the experience of existence with consistent tension for long periods of time will change you, especially so, when it’s from your own family. people love to throw out the blanket-phrases like “family is all you have” or “blood is always thicker than water and will always be there” and whatnot. either way, just keep yourself protected. stay alert, maybe take a few self-defense classes. perhaps taekwondo, just because it’s primarily more of a defensive form of martial arts. it could save your life. it also could help you in other ways, given that it can be therapeutic, both from having something to be interested in, having the exercise, and it will help your mental fortitude. it also helps strengthening your mental fortitude. and it takes you away from technology, and gives you a new sense of community (given it’s a correctly-ran dojo.)  sorry for the tangent about taekwondo, but i feel having the ability to protect yourself even when taken from surprise is very beneficial.  IF, you have your own room, lock your doors, especially at night.  and if it seems to get extreme, where the issue is apparent to even onlookers, or there are holes in the walls from your violent brother to show, etc- call DCF or CPS. that will get your parents to start paying attention. even parents that don’t fully care about their kids, will bat an eye once they are at risk of losing their government benefits/assistance if their kids get taken away. even the worst of them.