I also feel like the only types of states allowed to be successful after 1900 are British/American style democracies that embrace neoliberal free market capitalism. People seem determined to make any other political or economic system fail, while ignoring the huge failings of our current systems.
You forgot the part where if the alternative systems fail it's because all the Anglo-American style nations decide that they are going to screw them in every way possible and brutally embargo - sorry, I mean "impose sanctions" - in the hope that it will cause a revolution in the name of saving the wounded economy.
Despite which history will try to convince us that if they fell it was exclusively because of their own stupidity and incompetence, not because they were harassed to the point of exhaustion.
__________________
Remembering another trope, a common one is that the representation of the country, even if it does the same thing, varies greatly depending on the point of view.
To use Germany as an example: if they are the antagonist, they are Nazis in Imperial uniform. But if they are the protagonist... they are Nazis with a good PR team, in the sense that the story will try to portray all their atrocities as something good and positive that couldn't be more justified.