ccs
41st lv DM
The DM is right that he can't do much about it. The DM has no more social power than any of the rest of you. His or her power exists only in the game world. It's on you to communicate how you want to play and, if you're finding no satisfaction in that regard, to find people who do share your interests and play with them instead.
Both you and that DM are incorrect.
The other players may well be _______'s, but the problems are occurring because of in-game actions that the DM is allowing (or causing) to happen.
The shouting about "Have you killed the old man yet?" Nobody seems to hear you....
Contracting leprosy from the dead old guy? Didn't need to happen.
Allowing the other pcs to murder everyone in the bar? Didn't need to happen.
At any point when the crap is escalating the DM can just stop the game.
Won't solve whatever other social issues are running, but it will prevent the game from being the delivery system.