I'm having "HOME" problems?

My mom when I was 5 married this guy he was nice until the 5 month of him living with us and he started abusing my mom like hitting her kicking her a lot of stuff. He even would pull me and my brothers hair and throw us across the room. She finally divorced him when I was 11 and we lost our house so we moved to this old small house and my mom got a new boyfriend he HATES kids especially me I never talk to my mom anymore and if I try to talk to her it's usually when she's drunk and midnight and then he comes in there and looks at my mom like a psycho path and tells her to go to bed now. And he abuses my mom worst then my old step dad and makes her have with him. Did I mention he lives at our house for free and eats our food. He also smokes pot which I can't stand he used to do all types of other drugs. And my older brother moved out and me and him we went through everything growing up and I knew I always had him to talk to but now that he lives at my mammaws I'm in this alone and I don't want to move to my mammaws because she's been haveing medical problems and she still works so i don't want to make matters worst. I just feel so alone and my dad hes a drill sergeant so he's always traveling so I can't live with him. I feel claustrophobic and that have no control over anything. I pray to god (I'm a christian) everynight that things will get better it's the only thing I can do.