I agree to a degree... there are many, many people that would actually love a fascist to take charge and get those pesky “enemies of the state”, or whatever they would call them.
But there are certainly more protections in place in the USA and GB to avoid the tyranny from completely subverting democracy in the way it happened in 1930s Europe. Even when a tyrannical-wannabee wins, they are limited in the damage they can do.
We still don't know how much damage Trump will do before he leaves or how much damage Trumpism will do in future. Right now the US democratic system is badly compromised. A system that was supposed to have so many checks and balances such a thing would be impossible.
Right now our system seems more resilient that the US but that's maybe because it evolved over the 700+ years since Magna Carta instead of being made up by a bunch of guys over beers in the late 18th century. Even so, the populism that brought about Brexit and is endangering the Union itself should be a warning that we can't feel too complacent.