Well, facts are facts. Go do the research yourself. Quality of life? You don't want to go there.
Remember pal, the keyboard your typing on, the cell phone you use everyday, electricity and nearly every other modern invention came courtesy of America. We are the most prosperous and industrious nation on earth second to none.
The only reason folks outside of America have a raised standard for quality of life is because of America. We have the highest quality of life here in the world bar none - regardless of any lying media or polls or whatever BS you're seeing. That's why most of the world wants to move here. I don't see the hoards clamoring to get into any other countries?