This is a great analysis. It really shows the key to this break down in relations is not just differing interests, which are obviously important, but also the personalities of the leaders involved.
Ultimately diplomacy and politics is conducted by humans and humans have needs, wants, and urges. Trump is a public man with a giant ego, and as a public man with a giant ego, he cannot tolerate being contradicted or talked down to in front of the world.
But even beyond that, Trump is not a fan of the "liberal international order." In many respects, he hates liberals; and in any case he's never once coached his rhetoric or his politics in liberalism. Ideologically, he's closer to Putin than he is to Biden, or Zelensky for that matter. He doesn't respond to appeals to "shared democratic values" or "human rights."
Yet this is exactly what Zelensky tried to pull in front of Trump. Zelensky is still acting like he's in Biden's house and that he's going to get a standing ovation for standing up to Putin and his "monstrous tyranny." He kept trying to do his "freedom and liberty" and "no compromise" act in front of Trump as though Trump gives a ****. Fact is, Trump doesn't - he likes Putin, and he respects Putin's style of leadership.
Zelensky's biggest failing as a leader is his inability to detect when the wind's changed, and to adapt accordingly. Weeks before the war, he was still of the mind that Putin was all bluff, and that he was going to get away with EU / NATO membership. We saw this same character flaw here. Even with every indication that Trump is not Biden, and that Trump's America is not Biden's America, he still came in thinking he'd play the same song and dance.
He was wrong. A smarter politician would've realized who Trump was and what Trump wanted, and knew that the odds were against him since Trump was incentivized to make a deal with Putin so that he can turn his attention on China, and adjusted accordingly. Instead, Zelensky stuck to his line about not compromising with Putin, and paid for it.