>>96790902
Any kind of contrarianism. Dead or low magic world? He just has to be the very last wizard. Elf PC in the group? His character is racist against elves and he's -just playing his character-.
Normie or geek with normie energy. Despite what the suits at Hasbro think, normies don't belong in TTRPGs. Normies think it's lame to actually care about anything so they dole out measured disinterest, purposefully try to break tension with inappropriate jokes, and otherwise undermine games from within like termites.
MMO/WoW jargon like "build".
Podcast/forum warrior who hasn't actually played IRL before. I guarantee they'll get mad and quit when the game doesn't live up to the idealized idea of gaming they've conjured in their head over the years.