"The globe-trotter lives in a smaller world than the peasant. He is always breathing, an air of locality. London is a place, to be compared to Chicago; Chicago is a place, to be compared to Timbuctoo. But Timbuctoo is not a place, since there, at least, live men who regard it as the universe, and breathe, not an air of locality, but the winds of the world. The man in the saloon steamer has seen all the races of men, and he is thinking of the things that divide men — diet, dress, decorum, rings in the nose as in Africa, or in the ears as in Europe, blue paint among the ancients, or red paint among the modern Britons. The man in the cabbage field has seen nothing at all; but he is thinking of the things that unite men — hunger and babies, and the beauty of women, and the promise or menace of the sky."
Yup. I blame their constitution.
You haven't met a lot of French people :-)
Happiness as virtue is not universal, maybe you need some more time abroad. I know you said you visited 100 countries but visiting 100 countries and living in another country for many years is quite a different thing. Or maybe you just need different friends or perhaps a meditation practice, I don't know.
I'll leave you with this 2 minute video from Slovenian philosopher Slavoj Žižek, "Why Be Happy When You Could Be Interesting?": https://youtu.be/U88jj6PSD7w