World Cup Soccer
After having watched a few games from this year's World Cup, and having read write-ups on several more, the one thing that stands out to me is how totally unaccountable the referees are. They've made several terrible, game/tournament-changing calls, and don't really have to answer to anybody - even FIFA, apparently. The referees can call a penalty without being required to declare (a) what the penalty was, or (b) who committed the penalty. That's totally absurd.
I think this has cemented my opinion of soccer as an only-if-I-really-have-nothing-better-to-do sport to watch. I'll probably only be watching World Cups from here on out, and not particularly closely.