We don't call the Korean war the China and USSR-USA war either.
I don't think this is the argument you think it is...
Bullshit.
American weapons, American ISR, American planning, American funding... US politicians talk about a "good investment" and "to the last Ukrainian". I don't understand how you could NOT call it a US-proxy war.
Yeah. A proxy war doesn't mean that Ukraine doesn't deserve to be free.
We care about Ukraine and its people, the US care about money and power.