It is unique among the mega-huge sporting events in that the quality of the sport is actually lower than the ordinary competitions.
At the World Series, or the Superbowl, or the Stanley Cup, or the FA cup, we have the best teams competing with each other, while in the world cup, you don’t have a team, you have a bunch of (supremely talented) individual players.
On the other hand, I really don’t see FIFA particularly corrupt as compared to, for example, the NCAA, which exists solely to create the myth of “student athletes” in order to codify slavery.