(paraphrasing).
That is exactly what happened.
Given that Ukraine cannot win this war, and Russia is a nuclear power on the other side of the world from us. it was the right thing to attempt negotiation.
It required getting Zelensky to go along with it first, and terms were made to stop the killing.
Any logical mind would have accepted a deal.
Putin definitively showed he is beyond what is the best thing for Russia. He also showed he won't stop until he has it all.
Trump tried for peace, but he won't let Putin take more. He did what you hoped for, but didn't do it automatically like you want because he is not an anonymous internet poster like you or me, but instead is the acting POTUS with a responsibility to try to save lives and preserve the US from an unending conflict.