Both Macron and Starmer managed to politely correct him without triggering Trump. Zelensky was trying to do the same, but Vance couldn’t shut his mouth and decided to try and show to Trump he was a good boy.

Well, yeah: why else did you think they added Vance? Trump is getting too old and tired for his bullying to be effective enough on its own, so they sent in his minion to make sure the job got done.

You say "Vance couldn't shut his mouth" as if you think this was some kind of mistake or gaffe on his part, but no. Vance did exactly what he meant to do, on purpose. Or at least tried his damnedest, even if he wasn't completely successful in getting Zelenskyy to take the bait.