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Trump playing into Putin's hands. If you listen to Russian state media, and their proxies in the West (Doug McGregor, etc.) their narrative has always been that Ukraine, and indeed most of Europe are basically a puppet of the US (to a lesser extent the UK) So this is effectively some "proxy war" against Russia. So Putin negotiating with the US directly makes sense, because any "settlement" can simply be imposed on Ukraine by the puppet master (US/UK)
I'm sure Putin all but demanded this in his phone calls with Trump. And it plays right into Trump's ego - that Ukraine should be able to do whatever he wants because the US is just propping them up anyway.
Of course, this is far from the truth, although Ukraine is playing with fire to a degree if they don't accept what may would see to be a "reasonable" settlement - freezing the conflict mostly on current lines, no Ukraine in NATO, etc.
It can be true that our circles are very different, but from my viewpoint many would not agree that this is a reasonable settlement.