Zelenskiy suffers from little man Napoleon syndrome. Because he could't keep his ego in check, he just condemned more Ukranians to their unnecessary deaths by not signing the deal. Zelenskiy's body language of crossing his arms & not making eye contact is a defensive posture. He's acting on his emotions & pouting like a brat who didn't get his way. Unfortunately, for him & the Ukrainians the forthcoming life lessons will be unpleasant.
Trump was accurate in saying Ukraine doesn't have much, if at all, "peace" negotiations leverage. Trump could have been less belligerent/forceful in his delivery towards Zelinskiy.
JD Vance should have just STFU, not interjected, & just listened. It wasn't Vance's place to tell how Zelenskiy should be more grateful for the U.S.A.'s
help & it was a baseless assumption on Vance's part. For someone who likely has presidential aspirations, Vance should have just taken in as much as he could to learn how to approach/handle future geopolitical negotiations.
Zelenskiy saying Putin won't uphold his end of of the peace agreement is an obvious no brainer. What Zelenskiy didn't see in signing an agreement with the U.S., with regards to "minerals" access, is that this would allow for U.S. military presence into the Ukraine to protect American "economic interests" in the Ukrainian regions. The U.S. military presence would act as a deterrent to mitigate (military) shenanigans from Putin/Russia.
If there are valuable minerals, this would bring economic prosperity & stability to Ukraine, helping the country & its people rebuild. I would speculate that if there are rare-earth metals in the Ukraine, part of the agreement would include some sort of back-door kickback to Russia for them not to disrupt. Economically, it's a win for all 3 countries.
Those vilifying Trump for making deals with Putin obviously don't know U.S. history. FDR negotiated Stalin who killed at least 20M of his own people. Nixon dealt with Mao Zedong, the worst of the 20th C mass murderers, with upwards of 65M Chinese casualties. Putin is an amateur compared to Stalin or Mao. If those 2 U.S. presidents didn't geopolitically negotiate with the totalitarians, far more Russians/Chinese would have been killed.
Trump is following Sun Tzu's
Art of War in dealing with Putin.
Sun Tzu said:
Keep your friends close and your enemies closer.
Edit: I forgot. For those paying attention, Zelinkskiy was elected to a 5-year term as the Ukrainian president which officially ended in May 2024. What did Zelinskiy do to remain Ukraine's "president"?