I'm not saying every game and every match needs to be taken balls-to-the-wall seriously, but if you guys hate "competitive gamers" then I'm sorry but you're completely full of shit. Almost everybody takes gaming seriously when they go online. By that, I mean you generally try your best and do what you think is necessary to win.
I mean, when you log on to your Battlefields or Call of Duties or whatever you don't just dick around doing nonsense. You might not be sitting their, hyperventilating in anticipation of what your opponent may do next, but you're probably fully intending on playing the game. Would you get pissed if someone yelled at you for not "playing well enough" or "being bad"? Sure. Would you get pissed at someone who just ran around team killing or shooting rocks because "it's just a game and you shouldn't take it seriously anyway"? I'm going to assume yes over here too.
So, I guess all I'm saying is that everyone has a personal line. Some people may just want to play for kicks. Great. Some people want to dig in deep with a game and really figure what its all about. That's great too. If you find yourself on a server/match where the people around you are playing on a different "line" than you, then you are the problem. Just leave and go somewhere else where the people play similarly to yourself.