Is it normal to be an ungrateful teen?

All I ever do is run around and act like a selfish prick with everyone I know. I am so ungrateful to the people I should be respecting and demand all sorts of bullsh*t.
"Why aren't you talking to me like this?" "Give me this!" "Don't say that to me!" "Don't look at me like that!"
Whine whine WHINE.
I know all this and yet I never bother to change. All I ever want is for people to give me everything and for me to give nothing in return.
I even insult people in my head ALL the time.

I think I need to force myself to be more quite and respectful to other people. Sometimes I think that these days are waaay too liberal and if parents hit their children more often then I wouldn't act like this. Its only fair.