Nothing is wrong with you! I am also in a very similar position as you.
In the end you only got yourself so start taking care of yourself mentally and physically and try seeking help because it sounds like you are depressed.
When I turn 18 I'm going to pack up and start living MY life and limiting interactions with my toxic family.
You need to cut people who hurt you! You need to find better friends because I'd rather have a small circle of quality friends than a lot of fake friends.
Seek help, surround yourself with people who care for you, get a job, trying limiting the interactions with your family (avoid situations that will cause them to hurt you), find a hobby or just something that makes you happy, focus on school, focus on your dreams, treat yourself, go out more (so that you don't have to be in a toxic environment all the time) and trying living your best life because all of this is temporary and you deserve better.
Good days will come, be strong.