The older I get, I think one of the major flaws of the US system was creating a sole President. The great strengths of the US Constitution over many European ones (even given today's craziness) is that it explicitly sets up checks and balances amongst both the branches of the Federal government and between the states and the Feds. And it also uses the Bill of Rights to essentially ban even the most popular laws if they infringe fundamental human rights.
But despite all that, the singular President has turned into a king-like figure, because we can't seem to get around the fundamental human tendency to want a strongman leader. And this along with toxic partisanship is beginning to corrode everything I mentioned above. I really wonder if the Founders made a mistake not splitting executive power up amongst 3-5 people, merely because it might have counteracted this "worship the strong man" tendency in the human psyche.