Yes, it is a fact that the U.S. Constitution is largely an anti-majoritarian document. The separation of powers, two senators per state regardless of population, presidential veto power, the Electoral College, limited enumerated powers for the Federal Government, etc. That, and it never once mentions the term, Democracy. Ditto, the Declaration of Independence.
America's founders were apparently smart enough to know that unchecked democratic rule invariably leads to tyranny, mob-rule, and socialism. By which I mean that the poor and middle class vote for wealth redistribution (theft from their betters).
Yes, it's true that in countries like Switzerland Iceland, Denmark, Norway, Canada, Finland, the Netherlands, and Sweden democratic socialism produces happiness (the people in these countries being the happiest according to the world happiness report).
But the tradeoff is that, instead of there being a handful of super-wealthy people, we only have a lot of moderately rich folks. A tradeoff that isn't worth it in my opinion, which is why I support oligarchy. An oligarchic form of government is superior in terms of protecting the rights of the wealthy minority and the rights of the wealthy individual.
Unfortunately (and as Jefferson predicted), the power of the central government (state government as well) has grown so exponentially and rapidly (the Constitution now being little more than window dressing) over the past two centuries plus these same founders would probably slit their wrists due to all the plundering of superior people (superiority that allows some to become wealthy). Frankly I couldn't blame 'em. Really.