I'm not saying we are. But Ukraine cannot get a negotiated peace with Russia on its own. It needs another party to those negotiations to help facilitate them. There's no chance that Europe is actually going to step up to the plate (though if they prove me wrong, more power to them). So it's either the US, or nobody.
Which means Zelensky needs the US, and specifically Trump. But he didn't act like he needs us. So either he doesn't want a negotiated peace, or he badly misunderstands the situation. Because the situation is that Trump doesn't need Zelensky. The US doesn't actually have a lot of strategic interest in the outcome of this war. China is far more important to us than Russia.
We sided with Stalin. So the idea that we can't cut a deal with Russian dictators, well, we have in the past.