I seldom agree with DrZoidberg; and I do disagree with the conclusions he draws in this thread.
However in one paragraph he is quite correct:
When ex-colonies became democratic they copied the structure from their colonial home country, or USA's. So we got a natural experiment comparing the systems. The South American countries all copied USA's constitution and it turned out to be extremely easy to derail for powerful landowners. Not a good track record. But we learned from the other experiments in ex-colonial democracy that getting the rules right was actually not the most important thing. There's a whole bunch of social and cultural factors that need to be present for democracy to work. [Swammi's emphasis]
Yes. Systems similar to the U.S.'s "Presidential" system have often led to the dysfunctional oligarchies seen in "banana republics." And as DrZoidberg implies, these failures are due more to social factors rather than mechanical flaws in the U.S. model. (Trivial fixes like popular vote for President are not a solution.)
In fact, whether the Presidential system is intrinsically good or bad, the U.S. did rather well for over two centuries. There were hitches along the way, e.g. Civil War, but these can't be blamed on the system mechanics.
And for most of its history, the U.S. had exactly two strong parties, usually "big tent" parties. Obviously there are drawbacks to a Two-Party System, but it's worked rather well for the U.S. over the centuries.
But DrZoidberg fails to draw the conclusion that his own argument points to.
Nope. I'm a pragmatist. If something is working then don't fuck with it. USA is clearly working.
Is the USA working? Sure, it's very rich and powerful but much of that wealth and power is left over from its ascendancy after the World Wars. Trump didn't build America's great Universities, and neither did Obama, Bush or Clinton. Companies like Disney, Intel, Microsoft provide great wealth and power but, again, this wealth is inertial — the companies were already powerful in the 20th century. The U.S. has fair infrastructure, but much of that is 60+ years old.
To a large extent U.S. power and wealth is left-over from its great past, before its politics became dysfunctional.
So, the use of the present tense in "USA is clearly working" misses the point. The U.S. is the only developed country that fails to provide its citizens with health care or other safety nets (e.g. subsidized childcare). Racism is rampant in America. Partisan gridlock prevents needed investments. Democracy in the U.S. is failing: Control is increasingly turned over to the "powerful landowners" DrZoidberg mentions in the quoted paragraph.
There is no solution in sight. Convicting Trump would be a good step — it might alert some of the Yahoos that their guy is a criminal — but I doubt it'll do much good. However DrZoidberg's idea of leaving the criminal unprosecuted because he was elected is a non-starter for most rational Americans.