What does Russia have that US would want to fight a proxy war over? Certainly isn’t technology or natural resources.
Now that Ukrainian resolve to fight is cooling off, you can see Trump administration planning more wars - in Palestine, Yemen, Iran, Venezuela..
These operations benefit wealthy class in the U.S. (the profit from government contracts) as well as a fat layer of middle class Americans who are involved in making wars.
Every country that exports weapons has this incentive, including Russia, but the U.S. is by far the largest country producing weapons it doesn't need internally. International arms trade should be IMHO completely banned, because it gives (capitalist) countries strong motivation to cause wars. It's a negative externality.
Yes EU leaders called for deescalation, that is true. But the U.S., the most important NATO member, did not. There is a 2018 report from RAND that suggests Ukraine should be used as a tool to weaken Russia.
The Ukraine conflict, although there is a contribution from other causes (russian and ukrainian nationalism), is a proxy war between U.S. and Russia, a continuation of the cold war.
I don't disagree with you on Russia, but the US and EU (currently) is unfortunately not interested in deescalating.