Parents will not get off my........ Case...?

Wow my dad keeps b----ing me about my grades... I'm a freshman in highschool and have 3 A's, 2 B's and 1 very high C(78). Not only did I manage to get this grade up from a 77 to an 81 at the end of the semester by extra credit, but I'm also getting extra credit this semester too. The C is in Honors language arts (I have 2 honors classes). What my dad does not understand is that the teacher sucks at teaching. She'll give a writhing assignment and barely explain it and expect you to finish it in half a class period. I'm not the only person who knows this. Almost EVERYONE in the class agrees... A senior girl in the library I think even told me she was not a good teacher to have fresman year. But no. My dad thinks it's so absolutely necessary to be a b---- about it, say I'm not going to go to college and all my friends are going to go without me(my friends are dumbasses) and I'm going to work at McDonalds. When I tell my dad about my friends also having trouble in the class(failing) he'll get pissed off and say I brought up my friends when he clearly did... So yeah my dad rides everyone in the house and is a stubborn annoying ***... Might I also mention I've never gotten in trouble at school like going to detention or anything else.... I can't wait to get the hell out of here... Anyone else having this problem? Any tips? Only 1192 days to go....