It's to be expected in competitive game modes. I just wish that people wouldn't let it get the better of them.

Avoiding details, I recently ran a match in which a melee Dps spent so much time spewing verbal diarrhea in the chat box (widely about things that they very clearly didn't understand) that they fell to the very bottom of the dps counter in the final score. The entire time I was thinking, don't you see what you're doing to yourself?

I understand that people get frustrated, but you should never be complaining so hard that you end up preforming the absolute worst out of everyone on the team, and if you're going to complain, then you should at least be informed on the subject of your complaint instead of ignorantly spewing nonsense in an attempt to lay the blame at somewhere other than your own feet. If rage is blinding you that badly, then, frankly, it's time to step away from the game for a bit and cool off.