There's a major problem with your line of thought...Okay, a reasonable position.
My position is that we shouldn't and won't get involved. Not enough for a direct confrontation.
I am neither for nor against Ukraine. Russia is not exactly clean for how they've handled this mess with Ukraine from the start, but the West made the situation worse. If they did not consider the ramifications for trying to draw Ukraine into our orbit, then they're fools. If they did, but did this anyway, they're bastards.
I consider Ukraine's leadership to be both corrupt and delusional. I think Kiev is drunk on the possibilities of what Ukraine might have were it to join the EU and is willing to wage a war to gain access to it and NATO weapons. That is after all, what this war is about. I think the way Zelensky has handled the peace before it came to war is absolutely disgusting and delusional. I think Zelensky and his admin are (by necessity) outright lying about the damage they're inflicting upon the Russians and the willingness of Ukrainians to fight against Russia. A million and a half people fleeing the country does not paint strong resolution in my mind.
As for the West, we have only made the problem worse. We could have forestalled or removed the threat of Russian invasion had we only agreed to not allow Ukraine into NATO. There would be no real loss actual strategic cooperation, only face. It's no secret that the US and China are scaling up for a cold war. It's no secret that we cannot contain both Russia and China at once, nor can we fight both. Nor is it a secret that Russia is a declining power and this move is to simply preserve its survival, not grow its strength.
I think that Russia is making the right move for strategic reasons. Allowing Ukraine to fall into the hands of the West is a threat to Russia itself. All that remains is to see if Moscow and the Russians conduct themselves well in war. And thus far, the Russians have not wholly abandoned the rules of war and I'd dare say that Ukraine is more guilty of it than they (again, that being out of necessity). We'll see what happens later.
There was no actual threat to Russia from Ukraine joining NATO or the EU.