See, e.g., Iran's IGRC. Counterexamples: China, Russia — and the U.S.?
Ironically I was watching Nuremberg last not and is is schocking how close some of the leaders of this country are to characters like Hermann Göring, or Hitler himself in talking points. They are certainly populists but the language they used is MGGA (make german great again) so to speak. And factually that were not particular that good at it either most of Germans recovery is really due to the liberal government that pass laws that built the Autobahn were laws not by the Nazi party. They certain jumped on them and accelerate them but effective governence is not really for the populist
Putin did it better; he kept the military weak and aggressively managed the risk via the FSB.
The problem you have is these elected kings. Not just any king, pretty specifically the majority of the powers enjoyed by George III in the 1790s. The fact that you still have this, unreformed over 200 years later and still think that somehow your constitutional system is modern, is a matter for despair. Get yourselves a proper parliamentary system, with maybe a head of state as a figurehead.
As far as reforms, we need more to be sure, but there's at least the 22nd Amendment, formalizing the two-term tradition that Washington initiated and FDR abrogated into a hard limit, that means Trump can't legally keep power past 2028.
What a poorly thought out and questionably motivated take. It will no doubt be well received here.
In any case, reconstructing out legislature to copy european stuff isn't gonna change anything if the legislature still sees fit to vest so much power in the executive.