This theory would agree (and it makes sense to me): https://en.wikipedia.org/wiki/Strauss%E2%80%93Howe_generatio...
Richest underdeveloped country? Most powerful failed state?
a.k.a 90% of the population. At such point, you're just complaining about human stupidity, instead of any specific group. And our children will be just as stupid as us, but their leader will say dumb things about other issues instead of chloroquine.
Anecdotally I can identify two of the four living generations of my family having observed and corrected _obvious_ failures of their elder generation. What's perhaps harder to recognize is the new bad traits that get introduced.
To be fair, though, each generation has increasingly different circumstances than the previous one. The human circumstance seems to be varying more with each generation as of the industrial age.
Ideally we would collect and review all the previous lessons learned. But we tend to get fascinated by new shiny things (or Netflix series), so we aren't evolving optimally...
But still, let this be a lesson to those who would follow bad leaders to their own demise; or rather, let it be a lesson to their offspring who watch them follow the bad leaders.
I suspect humanity follows cycles of enlightenment, complacency, and self-destruction (or irrelevance, which is equally damning depending on the individual). We appear to be between stage 2 and 3 at this point.