Most annoying type of player of them all. Fact, not opinion. In one match on my PC version of the game (particularly in Nuketown 24/7 servers) I see people complaining about people using the grenade launcher/rocket launchers against them and how they keep dying, how it is ruining their kill/death ratio and also, cussing and using racial slurs at the people who were killing them with it. And in the very next match I get killed by the VERY SAME PERSON using with the very weapon he was complaing about in the previous match.
So, ever get pissed off at idiots people complaining about a weapon and then them using it? I'm sure you have.