I have been reading the beta forums just listening to people and yes they do complain a lot but the biggest thing they complain about is the game not being finished.
From what i get they are mad because the end game (past lvl cap) isnt implimented yet. they say that if the game is going to be released any time soon they give blizard a month to have it in before people complain. personaly i think its sad if people hit lvl 60 in a month. They dont realize that there is game pre lvl 60 they just lvl grind like mad until they hit 60 then complain. they should slow down and actually play the game. especially the closed beta people. they should hang arorund help people have general fun with the game other than the lvl grind we all know about. But you know it wont happen people are going to get the game lvl as fast a physicly posible and then be pissed that the game isnt finished.
It just makes me mad that people cant slow down a little and enjoy the game.