Donald Trump, the Ayatollah and Putin are very disciplined people. Ordered lives need to be grounded in value systems, moral emotions, and philosophies deeper than self preservations. Otherwise people start behaving like ants. Don't need a human brain for that.
Putin may be disciplined (I would believe it in case of a career KGB employee), but that has zero to do with the outcomes of his reign. The Russo-Ukrainian war already looks like a completely avoidable disaster, and we don't know yet what is going to happen.
Maybe a more sloppy ruler would not invade, instead preferring time-outs with lovers.
I'm curious what you mean here -- what discipline do you think Trump demonstrates?
Clearly no moral discipline; so I assume you mean work regimen? Which disagrees strongly with the evidence of Trump's golfing (although likely that in part is about him taking money from the treasury).