Why does everyone hate me?

This has been going on since a year ago (sixth grade). My teacher made me feel like a worthless trash and I hear them talking bad about me. It's not like I'm stupid or anything, I just don't have the best grades in the world. I try and try and this year was one of the worst, my parents are going through a divorce.While I have to go back and forth always depressed because it's so stressful. In the beginning of the year I had the best grades! Anyways I have a new teacher fresh from college and of course I an the one getting hated on. On to my friends, I don't have any real friends they share no common intrests, maybe one which is different. They really don't like me and I can see some glares when I turn around. My ex best friend started calling me retarted,ugly,stupid,etc. Guess what my homeroom teacher did!?! He made me the bad person instead of her. I shoved her once because I got anger issues.She's always laughing at my mistakes. Now as for my parents my dad understands me more, but for my mom ITS totally different. She just keep rambling on and on. One minute she stops talking then she starts talking again just to make you mad like she's an Internet troll(lol). My grandma says I have the "devil" inside of me because I am an atheist and thinks I am confused. My English teacher is really evil and always gives me the evil eye and hates on me because nothing I do is perfect enough for her.