- Whining and complaining about how your faction and everyone in it is a noob.
- Getting depressed about how you lose all the time
- Belittling other players for not being perfect.
The whole idea of a team is that its members cooperate with one another, and cooperative language is generally a lot more productive in any case: "Hey, I appreciate your healing in here. Next time I'm carrying the flag, though, could you and I team up with you focusing on healing me in particular? Thanks!" Some people can't take any suggestion or advice whatsoever, but chances are that the healer actually wants to cooperate and help his or her team succeed. They just even be happy to accept a polite request. And if not, spewing all manner of insults just makes the insulter look like the bigger idiot anyway.