Was it ever? Social atomization, hyperconsumerism and a generally blighted physical environment (who-gives-a-fuck suburban sprawl nearly everywhere) are what define your life in most parts of this country, if you don't earn a high enough salary to offset their effects. That, and the relentless "life == work" mentality exhibited even in other comments in this thread.
Lest I come across as a glass half-empty person, let me mention a few things about this country that I genuinely like and which rare (if not unique) throughout the world: (1) Genuine ethnic diversity (simply unmatched in its breadth and scale), and a genuine, bedrock belief that (at least in principle) if you're a citizen you have a right to be here and to live your own life, dammit whatever your ancestry, religious…
1) The diversity may be partially right, but even if you are a citizen there still is enough discrimination especially against black people than in many first-world countries
2) Okay I grant you that, for a single country the US is very beautiful, mostly because of its sheer size. That's not to say there aren't beautiful spots in other countries though, there just cannot be as many
3) LGBT and abortion rights while there still is the bible belt, people blocking planned-parenthood institutions, and a significant part of the government actively trying to ban abortions and same-sex marriages, partially successful
4) The new world perspective through the rise of a new country only a few hundred years ago lead to lot's of innovation, but it is an illusion that the USA is the only country where any innovation and creativity happens