The US is probably no worse than any other country, though the large coverage by its media allows the rest of the world to openly see its flaws.
Culturally, its one of the messiest cultures in the world, but that is explained by its foundation. This however seems to have led to a polarisation and extremism in beliefs in some areas of the country, rather than the cultural boiling pot one would expect.
There is a fixation on money and wealth that is disturbing. One analogy I was told recently was an American and an Irishman, who see a mansion on a hill. The American says "Someday, I'm gonna live in that house." The Irishman says, "Someday, I'm gonna get the fucker who lives in that house." The point being that Americans have respect for wealth, and for the wealthy (which might explain their bizarre celebrity culture), whereas another culture (Irish being my own) looks at wealth with distain, seeing the wealthy as corrupt or having cheated/chanced their way to success. The USA is probably one of the most unequal developed societies in the world; it boasts soem of the worst excesses of personal wealth and some of the poorest people in modern societies.
With that and the fixation of military, as well as some of the worlds worst politicians, I don't think I'd ever want to live in the US. My visits there before have been good, but I was just as disturbed with many things that I saw as I was enthralled.