As a proud veteran of the US military, but one who has lived in 3 other first world countries for periods of time, allow me to say.... Nope, we simply aren't, both on a purely subjective level and according to any number of metrics. And it seems sometimes that we've all but given up trying. And if that statement comes across as unpatriotic, well, forgive me for wanting my country to do a little better sometimes.
We are far from the worst country in the world, but our rankings in things like literacy, health, economic mobility, developmental indices, the Gini coefficient and others show pretty much that we simply aren't the best in many, many things.