When the US tries it’s hand at nation building, and our government diplomats, consultants, and mentors are making suggestions to nascent nations in what kind of republic framework to use, we do not suggest the same Constitutional system we have. We normally try to guide others to a variation of parliamentary systems with a weak president figurehead.
Our own government knows not to use it’s own model for other nations! It’s not that we’re exceptional, just that we’ve beaten the odds so far. We used to try to copy the US system other places, but they kept failing to executive branches that seized power. How the US held on as long as it did is a wonder. That said, it looks like our exceptional run is effectively over. The fox is in the henhouse and Congress is cheering the bloodbath.
Yeah, our big democracy talk is just like the pirates code from Pirates of the Caribbean: flexible, with a strong vein of selfishness.