I am a pub DM player, (Don't judge me, there are good players on the servers I go to) but I do complain when I get owned several times in a row. "omg", "wth", "..." etc. I know I shouldn't be, but I'm currently trying to work on that.
I was playing with you earlier today and you were complaining even as you were kicking ass.
I used to be like that, but I realized a) it only encourages the enemy, b) makes you look foolish, c) I play better when I don't waste time typing.
I admit I still hurl obscenities sometimes. Especially when Snowden is kicking my ass, I will kill that guy so hard one day.