I'm a Finn. I personally interpret that survey as Finland being the least unhappy place. There's a social safety net, health care is taken care of, you know your life won't get destroyed by the slightest misfortune, you get a good education for free, your surroundings are generally safe and well maintained, you feel safe & are fairly certain nothing bad will happen, there are people around you who share your values, life is good.
Things that for example the article author's favorite USA does not have. But of course a Murkin' can't accept that. I fully expect him to gripe that somehow the Corruption Perceptions Index is also somehow unfair to his favorite country too, and just cannot be right.
And maybe check what Finland is doing with its military and what happened around World War II before saying that USA pays "most of our defense".
What's really rich is Americans deciding they no longer like their self-assigned World Police role, and managing to blame their supposed allies for that. Never underestimate the quality of Russian psyops, I guess.
These are America's choices. And it's America's choice whether to wield these in world-leading competitiveness or as ossified self-serving bureaucracy.
Other countries make other choices about where to do world-leading R&D (that Americans can take advantage of as lower prices). Chinese solar, for example.
For Finland, discussion seems to hinge on whether "happiness" is "close enough" to "contentedness".