I need help with my parents?

Wow, where do I start. Ok, well this all started back in January, when school started back from winter break. So, my first semester in high school had just ended, and I made all A's like my parents had pretty much made me do. Thing is though, I didn't get any reward! I mean I know that sounds kind of bratty, but I mean they expect so much out of me, and then I don't get rewarded. So, upset about this, I start off my second semester kind of rocky. I ended up with all B's at one point, and my mom took away all of my stuff. This is where the hatred for my parents start. I mean so I don't get a reward for getting all A's yet I get stuff taken away for B's? How unfair! Ok so after they take everything away, this is when my bad temper starts to show. I start getting being a jerk to my mom, because honestly I don't care about her right now. Then this weekend it snowed and I decided to take out the golfcart. I did donuts in the gr by the neighborhood pool and it left marks, but nothing bad at all. Of course my mom flips out without even seeing what happened, starts yelling at me, and of course I yell back. My dad is in Arkansas now, and he called me and started yelling at me and calling me an idiot and stuff, so I just smarted off to him and hung up. I mean I can take all of this pressure right now, I am only 15. Is this my parents fault, or is it mine. They treat me like I'm an adult, when I'm really not....This is just a summary by the way, not ALL of it. Oh and just a second ago I was on Facebook talking to a friend about homework when I wasn't supposed to be on it, and then she tries to read all of my stuff! I told her no that was not going to happen and now she is threatening to send me off to military school! What is her problem????