Lazy dad, b!tchy stepmom, and annoying 4 year old brother. How do i cope?

i am sick of them all! my dad does nothing but whine and sit infront of the tv! my stepmom thinks she knows everything, gets angry at every little thing that doesnt go her way. oh and she eats everything in sight. my little brother does nothing but cry! i swear im about to lose it in this hell hole! what are some things i can do to cope?