Did you people actually catch the social criticism?
This movie is genius. The rating pretty much shows me that people just saw this movie as another gross comedy. When you really think about it, this movie is easily as good as borat. Most of the people who saw borat and loved it just enjoyed the movie as another stupid comedy with an idiot in the lead who bumps from one problem into another. In reality, both movies deal with two serious topics and show the social problems related to them. Brüno is really underappreciated. I think most americans were offended by the rawness and truth in some of those scenes.
The end fight scene was definitely a big turn off to most americans. I'm austrian and I have to say, this movie speaks for itself.