Trump took Putin’s unyielding “Nos” personally, which, given his sensitivities, left Trump open to approving various retaliatory measures against the Russian leader. From Andrew Korybko at korybko.substack.com:

Zelensky, anti-Russian US hawks, Melania, and the Mainstream Media each exploited in their own way his false expectation that Putin would agree to a ceasefire-partnership deal.
Many are struggling to make sense of Trump’s decision to clumsily thread the needle between radically escalating US involvement in the Ukrainian Conflict and walking away from it. The preceding hyperlinked analysis concluded that he was manipulated into this by his advisors, who exploited his false expectation that Putin would agree to a ceasefire that doesn’t resolve the root security-related causes of the conflict in exchange for a resource-centric strategic partnership. This observation will now be elaborated upon.
Trump campaigned on the promise of ending the Ukrainian Conflict “on day one”, which he later admitted was an “exaggeration”. He claimed that his friendship with Putin and keen dealmaking skills would easily bring this about. In pursuit of that end, Trump tried sweet-talking Putin by blaming the conflict on Biden and Zelensky, lending credence to Russia’s claims that Ukraine’s NATO aspirations posed a threat to its security, and promising that “Crimea will stay with Russia” once the conflict ends.
To further sweeten his proposal for an unconditional ceasefire that would essentially freeze the conflict along the Line of Contact, Trump also suggested a resource-centric strategic partnership with Russia. For his part, Putin suggested the same, albeit with the intent of encouraging Trump to coerce Zelensky into Russia’s demanded concessions for peace. Nothing was ultimately achieved due to the resultant deadlock, which Trump apparently took personally, thus making him susceptible to manipulation.
More Ukraine aid is America First?
Russia is growing economically and sanctions or I own the world from a WWE wrestler and teevee star doesn’t scare them.
Detachment from reality is the theme of FUSA.