I've both kicked and been kicked from groups
I don't consider myself a noob, but everyone has a bad night occasionally.. for example in this game you could be a bounty hunter healer
However your entire group decides that they feel they should tank the hard mode, sorcs, mercenaries, and everyone else but the tank is getting owned
Trying to heal that as a bounty hunter is going to be damn near impossible due to heat issues, I dont' know about the other healers
could easily make the healer look like he sucks when its everyone else trying to tank it like its a normal.
I wouldn't worry about it, everyone has bad days, and I'm sure its happened to more of us then it hasn't.