Problems communicating/interacting with my family, please help?

You don't say what happened to your real father.I would say that your step-father is the main concern here.You do not approve of him and I can see why.I went through the same thing when I was 10yrs.old.Step father drunk,hits mother,cruel to me and my brother and so on.I solved this by going to my uncle[godfather]and told himeverythingg that was going on.He went and sorted my mother and step-father out.[What was said I don't know] but suddenly the problems went away. I went to see my uncle every Sunday and I know he was checking up on how things were at home.I never forgave my step father but we got by.Have you got any close relation you could go and see?You have to tell them everything what is going on.You stick to your education whatever you do.Good luck