I'm happy right where I am, thank you very much. I'm within a 3 hour drive of many different state and national parks, there's great fishing and hunting to be had, people are generally down to earth and friendly with each other, and we have some of the best coffee and craft beer in the country.
I don't think the message in the OP is to move to Finland, but to recognize what factors in their lives make them happy, or more correctly, what deficiencies in American culture make Americans less happy. Americans today have a tortured understanding of how socialistic elements of government help them, and so don't enjoy the security and peace of mind that a cradle-to-grave social support system offers.
You are also likely better positioned than most other 36-year old Americans, many of whom are trapped in dead-end jobs that barely cover expenses, leaving them one medical problem or layoff from financial catastrophe. How can one be happy like that? Finns don't have to worry about that. Perhaps you don't either.
I felt, when I lived there, that US culture seemed, in a way, to be built on some kind of unattainable marketing-led myth of life
What more sure-fire way is there to be dissatisfied than to set the unachievable goals for happiness characteristic of consumerism.
Americans are also being made unhappier by the divisive demagoguery that facilitates fear and resentment.
Many if not most Americans are of the opinion that America is the greatest country on earth, offers the most freedom and opportunity, and that everybody that doesn't live there wishes he or she could. They are unwilling to consider any other model in any other country as having anything to offer them. Who remembers Michael Moore's "Where to Invade Next"?
From Wiki "
In the film Moore visits a number of countries and examines aspects of their social policies that he suggests the United States could adopt. He visits Italy, France, Finland, Slovenia, Germany, Portugal, Norway, Tunisia, and Iceland; respectively, the subjects covered are worker benefits, school lunches, early education, college education, worker inclusion, decriminalized drugs, low recidivism, women's health care, and women's inclusion and leadership role in society."
Conservative Americans fight these things, facilitating their own unhappiness as well as that of their liberal neighbors. They make America a less desirable place to be.
As I have mentioned before, our lives became much better when we expatriated from the States to Mexico about a decade ago upon retiring. We traded an angry, divided culture that had weaponized religion and embraced a gun culture with attendant continual mass shootings, worsening extreme weather, and widespread and growing racism for something more consistent with our preferred lifestyle.
And we enjoy all of the same freedoms we exercised in the States as well as a few more. I especially like that most drugs available only by prescription in the States are over-the-counter here, not to mention that these medications are much less expensive (as is almost everything else), which increases our economic freedom. These people are happier than Americans as well, and if we weren't also happier here, we wouldn't be here. We'd still be in the States.