What do they want from me?

for my whole life ive been having problems with my parents since i was a kid they never trusted me and acted like i was and idiot even tho i was probably one of the smartest kids you've ever met after a while i started to get i guess you could say depressed so i started smoking weed when i was in 7th grade ive been caught by them a few times and arrested once and even when i told them i stopped and i did it seems that my lifes gotten for ****** up after i stopped because they never let me do anything. I can't go outside unless someones with me (my older cousin), apparently all my friends do drugs and are drug dealers and i sell drugs (by apparently thats what my parents think and say) i always try to gain there trust and im always good ive showed them im not a ******* dumb but it seems that nothing works my parents always think im up to something sketchy and they always want to know where i get money from because they never give me any cash and they think im some big druggy/drug dealer and say i wont grow up to be **** my dad calls me and crackhead like babies drink milk and recently (last week) i got my report card and only had 1 C which was in geo hon the rest were A's and B's and when i gave it to my dad he just dropped on the floor on purpose to like emotionally hurt me r some **** and said i can't watch t.v. during school days or go on the computer which is all i can do since i dont hav an xbox or ps3 all i got is this ps2 with games from like 05 and i got grounded while my lil sister who is in 6th grade had like 3-4 C's and he didnt say anything bad to her and my mom came home and said next quarter ill prop get a D becuz im stupid and im not trying in school. and i started to skateboard and since my parents said i was like a druggy they took apart my board and said they dont want me skateboarding anymore (this happened during the summer) and i dont know what the **** to do i dont have any behavior problems and they have no reason to think im doing any kind of drugs anymore or sellin anything but i cant stand it and im about to just do what i want at this point i just want to finish high school and get out of there i dont care about having any kind of relationship with them anymore someone tell me wtf im supposed to do