My story *TMI-contains abuse*

Every since I was younger I remember being thrown around by him. I remember the first time I messed up when I was in first grade. That was the first slap. After that it didn't happen and once again he hurt me. I remember me telling my mom and her confronting him and he came in my room and screamed at me yanking me up by my shirt and screaming that I lied. I remember my mom telling him not to touch me yet her watching him yank me up. I remember getting into a fight with my brother and my step dad grabbing me by my hair and everyone watching yet not doing anything. Then I remember watching YouTube and him not agreeing with what I was watching because it had curse words in it that I had missed I remember going to grab my headphones and he grabbed my wrist and then pushed me. He left bruises on my leg from pushing me into my couch hard. I feel like I can't do anything about it. PLEASE someone give me advice cause I can't handle this any more.