The fact that I don't have the time or energy to even want to attempt it anymore. Nobody likes playing for an hour and 4 rounds of your life and then realizing that one of your LFG team members has been concealing a mental handicap for the last hour and you're actually doomed. And god forbid I get to the final boss and can't beat it because I spent 4 hours playing the same game and have "IRL" matters pop up that I have to tend to.