I really liked this film. I was worried that it would be super over-acted like many satires are, but I think the film hits the right balance. It's not surprising that the media don't like a film that criticises the media. In fact, it would have been really wrong for the film to get good reviews.
Out of all the "comet hits the earth" films, this one seems like the mostly realistic one...which is a scary, scary fact.