They do not understand that it's only a good thing for their game. They actually get more for their money than they expected but they dislike the fact that others get the same thing for free. It's in a human's nature to always compare themselves with others.
women = TF2 community
guy = TF2 developer
stupid girl
LoL = faggot game
valve made an awesome 50$ game into something for bums and cheaters