I think anyone who wants to lead a country or hold office should be forbidden from it. Figure out some qualifications to disqualify anyone truly unfit to lead and have a lottery for everyone else. Maybe give out extra entries for volunteering or other public service, but make the process uncorruptable.
Then at the end of their term everyone gets to vote on how good a job they did. Maybe execute or imprison anyone who gets a bad enough score. If you get high enough, you get a nice pension and favorable mentions in history books. Either way, no one is eligible to be picked again. They could advise the next administration if everyone agreed.
I can think of a hundred ways this could go badly, but I’m not sure the result would be any worse than what we’ve got.