America is only a very small bit democratic. Calling it a democracy is a ridiculous exaggeration. But you're right that American voters are still clowns for not bothering to use the little bit of power they had.
We have 7 “presidents” exactly to mitigate a one time fuckup. We definitely have 1 to 3 not very good people there, but since they are 7 and they all have to be in consensus if they do decisions, it is not as bad.