I feel I should participate in this thread (I'm the Warrior, btw) as this thread was brought to my attention by my FC.
Where did I kick you for doing poor DPS? We even killed it once, even though your performance is questionable at best, and nobody kicked you. I got 3 static friends that wanted to join for some late night fun. I have never kicked a person for low performance, if anyone deserved a kick in that group its the Paladin who killed all the DPS.

I haven't read any rules that forbid me to play with my friends, if I offended you then its not my intent. With that said however....

If you feel to bring up the DPS being the reason you got kicked, perhaps that is something you should improve on, rather than sit at your throughput level and point fingers how others are rude, mean and derogatory towards you on the internet. I personally prefer the option to find a guide on someone good, and learn from their knowledge they freely share with the community.