It doesn't take much to satisfy their need (basically just nice words about the US), but they'll absolutely burn bridges if they come to the conclusion that you're unwilling to show the US this courtesy.
Trump very obviously being part of this wing, is one of the reasons that gave his campaign for the first term such a huge boost. People were convinced that he wouldn't betray the US, like they were betrayed by nearly every politician before (but maybe Bill Clinton, although, in hindsight, he absolutely screwed over Europe by continuing the Russian shock therapy and not supporting Russia in updating the CFE treaty).
Vance is somewhat part of this wing, too, but to a much lesser degree than Trump. E.g. he acknowledged in his speech at the MUC SecConf, that the US made what he considers to be past mistakes, but Trump pretty much never acknowledges what he blames on Biden and Obama to have ever been official US policy (even if he doesn't outright deny it).
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Hence when Zelensky suggested the US will "feel it", too, in a slightly threatening way (due to the language barrier, I guess), Trump literally blew a fuse. You could see his head changing color in real time. I'm surprised he had the patience left to toss out the media semi-politely.
IMO, Zelensky should have picked up on Vance's hints to present himself grateful and stop trying to get commitments from the US infront of the media. Next time he should negotiate in his native language and bring a very capable translator, because picking up on such nuances is anything but easy if you're quite inexperienced in a language.
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Trump is not really vindictive, despite his talking points (see him refusing to retaliate on Iran for shooting down that $150M drone, him not going after H. Clinton at all once in office, selecting Vance as his Vice, meeting with Scarborough and Brzezinski, ...).
So Zelensky got a good chance to set things straight, but Trump has also made clear that how the US progresses from here is up to Ukraine making the next move.
Knowing Trump a bit, he will push ahead with talks with Russia and keep increasing pressure on Ukraine until Zelensky agrees to a ceasefire and joins the table by making talks with Russia legal again.
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Also Zelensky should take that "minerals deal". Despite being sold as such, it doesn't give any minerals to the US, but establishes an Ukrainian semi-sovereign fund with the focus of rebuilding Ukraine, financed through the Ukrainian government's revenue from natural resources and financial injections by the US.
Over time it'll also turn into a fully sovereign fund for Ukraine (unless the US keeps pumping absurd amounts of money into it) and Ukraine can withdraw money from it if they need it elsewhere.