Whats the best thing i could hope for?

The best thing you can hope for is how you plan your future. You are stuck in this situation only temporary because you will grow up to stand on your own feet. The best thing for you to do is plan. Make sure you take your education seriously . If you have not done that, it is never to late . Make sure you set yourself up so you can find yourself a decent job. Ask advice from teachers and respected older people . Look for things you are good at and where you can improve. Try to be industrial and do things . Get out of the house and keep fit. Try to eat healthy and make sure you eat fruit and veggies . Work on yourself as a person and try to be kind, considerate and polite. Train yourself and be aware of possible personality traits that you have adopted from people around you and are not good. Make sure you don’t hang around toxic people . You’re better off alone or with your siblings than hanging around people who use drugs or abuse alcohol. You sound like a sensible person and you will be able to make a different future for yourself and possibly your siblings by setting a good example . All the best ! https://www.jw.org/en/bible-teachings/teenagers/

if theyre being abusive talk to someone in cps about it

You do exactly what I did - you turn 18, move out of your parents' house, put yourself through college using scholarships and grants.  You get an advanced degree.  You get a professional license.

You never look back.