To be fair, every youth generation has been criticized by older people for being different in their ways than the older people's youth generation.
The cussing and "garbage music" (BTW, I DO think mainstream music is shit, and I'm 17) and odd ways that your criticizing us for are the same kind of things that the adults of the late sixties said about the teenagers protesting, listening to rock, and becoming hippies.
I do, however, agree with you about the stupidity of some of the other kids.
But that is not really their fault. It's mostly the public schools' faults for giving up on some kids and saying that they can't help them anymore. (Unless, of course, the student drops out)