1) Way too stringent rules and hardly any flexibility from the admins' parts, which critically limit roleplay. Every time I create a character that's slightly different from the generic faction's norm (eg. a Rheinländer with an arab background or a black mercenary), my roleplay gets immediately shut down.
2) No humour. Seriously, this community needs to lighten the feck up and stop being so damn serious all the time. Every time I crack a joke, I get warned / sanctioned / banned.
3) The witch-hunt against active members. A lot of very active people have been banned when I was active, because they made mistakes. Guess what, because they invest their whole life into this game, they tend to have a higher probability of making a mistake somewhere in their playtime than those who don't.
4) Constant drama. There's always some sort of major sheetstorm going on that divides the community.