I think a big thing for me is, being a basketball person, I hate the attention other sports get. So it's easy to hate soccer right now, cuz I'm jealous of the attention it got over the NBA Finals/NBA draft.
I hate how the world (including the U.S.) goes crazy over the World Cup, but the basketball World Championship nobody seems to care about.
I hate the passion I see when two fans discuss soccer, compared to how I see two fans discuss basketball.
I hate how people like Michael Phelps and other track and field type sports seem to get all the attention at the Olympics, and basketball is treated like an afterthought.
I hate how the U.S. shuts down for the Super Bowl, but the NBA Finals seems like it's just something else to watch instead of summer re-runs.
I hate how the NFL draft is a 3 day event, but the NBA gets 3 hours.
I hate the attention college football/bowls/BCS gets, compared to things like men's basketball. (Although I'm glad to say the first weekend of the NCAA tournament does get the attention it deserves though).
I hate how if I watch Sportscenter on a Saturday, Sunday, or Monday in November or December, I'll see 55 minutes of college football and NFL coverage, and if I'm lucky 5 minutes of basketball highlights/news.
I hate how people call NBA players thugs, but seem to be much less harsh of NFL players.
I hate how pitchers and catchers reporting, gets more attention than the NBA All-Star game and trade deadline.
I hate the national attention I see for MLB spring training games and NFL pre-season games, compared to what seems like no coverage for NBA pre-season games.
I hate that the number of people who play fantasy baseball and football compares to the number of people who play fantasy basketball at the same rate kids played Nintendo or Sega vs kids who played with a Neo-Geo, TurboGrafx, or Atari Jaguar.
So right now I hate soccer because I'm jealous.
If it was just like hockey where nobody south of Canada paid attention to it then I wouldn't have a problem with it.
(Obviously some of these are an exaggeration, but the mere perception adds to the hate.)