The funniest thing is...
Let's say to anyone here that Russia is 3-4 times bigger than Ukraine and there are no chances for Ukraine in this war because it simply does not have enough soldiers. The answer would be - haha NATO is 6 times bigger than Russia! And then you should say - wait, if it is NATO, Russia should target its nukes to the US cities. The answer would be - haha it is not NATO! we are just helping Ukraine.
So if Russia is fighting against NATO(let's consider such a possibility), we should expect only one decision made at a single moment in the future - the nuclear decision. Or, alternatively, there are no chances for Russia to win in a war against NATO which is 6 times bigger.