hidan, i am one year above you, and i can tell you this, it gets better >.<
thats all i can really say, because in the first year of secondary school it always feels as though the teachers are always mean to you, but they are just trying to "whip you into shape" for future years, they stop pretty soon, don't worry, and as for the thing about getting annoyed at other students, try and find out what they like/ their hobbies and see if you have anything in common, if not, just ignore them, you probablyl hear it alot, but it is true...
and try to think about how others must feel aswell, you are not the only one who thinks this...