Hmmm. So an overgeared DPS pulls threat off an LFR tank and tells the tank to do his job? Isn't it the job of the DPS to ride right up to, but not cross the threat line? Is it possible the tank was in the proper gear for LFR and the DPS was way overgeared?
Then after the DPS pulls threat, comments in chat, tells him he is a waste of space, comes here and complains. I wouldn't use elitist, other descriptions maybe, but not elitist.