Venting about Stepfather

so idk where to start....well i live in america for 5 years and
well basically I live with my mom and my stepdad, and he is the biggest problem ever. My mom had my little sister 3 years ago, and she does everything by herself for her. My stepdad didnt buy my sister one shirt nothing, zero, except like couple of toys. He never buys presents for anyone, even for like new years nothing. He used to hit my mom until ic alled the cops and he went to jail for it. But my mom cant divorce him now because she just lost her job, and she has a little baby. He never did anything for me, we have 3 cars and he will never even drive me to school, EVER! He treats my mom like crap, he puts her down for everything. She cries like everyday. She does everything around the house, and he never even says thank u! When she was sick he never even went to buy her medicine, nothing, treated her like she was disease or something. When my sister was 4 months old, he bought a house with his ex wife and didnt even tell us about it, but then i found a mail bout it. My mom wants to divorce him so bad, but we just dont know wat we r going to do about this. Today they had another fight, because he said he will go to Russia for however long he wants to and wotn leave us any money, or anything! He had like 5 wives, and 6 kids. He calls my bf blackasses because he is arabic, and he has a half arabic grandaughter! He disrespects me so much too! He hit me too before and went to jail for it. Idk everything is just so messed up....idk what to do. He is the "president" of a company, and we have zero, like honestly he bought me a scarf since my mom maried him. There is jsut so much more but i dont want to type it all =[ I just feel so depressed and sad. And he wont let me drive those 3 cars because he is an problem, he wont even like buy food for the house. My mom has to buy it. She does everythnig literally! Cooks, cleans, watches my sister, pays for her daycare, buys all of us clothes. He doesnt even love my sister. He doesnt love any of his kids, he never calls them or is involved in their life. He left all of them when they were little to like basically starve! Please help me, if my mom divorces him i want to get every penny out of him, for everything he did!







sorry for venting =[ but i just feel so sad and depressed idk what to do