Zelensky knows that Trump is a faithless liar.
Any agreement with Trump isn't worth the paper its written on.
He's betrayed allies in Afghanistan & Syrian Kurds.
https://apnews.com/article/donald-trump-syria-ap-top-news-international-news-politics-ac3115b4eb564288a03a5b8be868d2e5
He's torn up trade agreements he signed just 4 years ago.
https://en.m.wikipedia.org/wiki/United_States%E2%80%93Mexico%E2%80%93Canada_Agreement
He signs contracts then doesn't pay.
https://www.nbcnews.com/politics/2024-election/cities-seek-750k-unpaid-bills-trump-campaign-events-rcna174757
He picks cherry picks winners based on who flatters his ego or who donated to him.
https://www.cbc.ca/news/business/corporate-donors-trump-inauguration-1.7430028