Show me all the indices where the US is #1 and I'll take your argument in consideration.

As measured .. how? I understand liking your country. I'm an American, too. I like my country, a lot. But, I think that the phrase "we are the best in the world" gets thrown around a lot as a meaningless platitude. It gets used more as a "my team is the Yankees"-style of statement. e.g. expressing your preference/allegiance, rather than meaning what it actually says, which is that the US is the 'best' in the world.

To be the 'best' at something, you need to define how you're measuring that. Healthiest? Happiest? Longest life span? Because when you look at actual metrics for these types of things, across multiple countries, the US does not rate at the top.

Have you seen this clip of Jeff Daniels in "The Newsroom"? https://www.youtube.com/watch?v=wTjMqda19wk ("America is not the greatest country in the world anymore")

Can you expand on that?

At what?