So there's really NOTHING that gives you joy? Friends? Family? Hobbies? Pets? A local park or museum? Games you play? Shows you go to? Something you volunteer for or see other people volunteering for? Etc?
How many of those quite a few are going to have to make their lives in a future where the U.S. is a totalitarian corporate oligarchy and climate change is making large parts of the Earth unlivable? Because they won't be as happy then. Even if they vote in favor of it.
A personal sense of joy is not the same as social sense of joy, so while you will find joy in this, the social sphere as a whole would not necessarily do. The highest ranking countries in the list are those with a substantial welfare plan that aren't ideologically aligned. As far as the list goes, the global level of happiness has been decreasing for the past years (climate change, wars, covid, other stuff).