Why is this the #1 song in America?

This has to be the worst song I have heard in a long time! I cannot believe people actually bought this garbage. Eminem sounds horribly confused, 5o Cent is totally stealing Mase and Lil' Wayne's flow and Dr. Dre sounds bored. The lyrics are so nasty and so disrespectful. What is wrong with America? What do you think?
[Warning: Explicit Lyrics]