Exactly. Russia is needing and getting more support. Ukraine is needing more US support. We can call it a proxy war for now but eventually both sides will need more bodies. The end game is not the destruction of Russia it’s WWIII.
It is ridiculous to suggest this ends with WW3.
If people are worried about large scale wars, they should be worried about nuclear proliferation. For 80 years, Europe and allies in Asia have been able to side with the US and get an ironclad commitment that American strength will keep the peace. In exchange for that commitment, free and open oceanic travel, nuclear nonproliferation, and no wars of conquest are going to be the laws of the land (and sea).
The failure of American leadership to partner either European and Asian allies is going to have an obvious effect: looks for security elsewhere. If American hegemony isn't keeping the peace, maybe the bomb will.
If you were honestly concerned about WW3, or large scale wars, you'd be concerned about the precedent Trump will set by failing to do the minimum to help Ukraine defend its territory. Don't partner with the US, just get the bomb.