We should also remember that Vlad has that nuke deterrent. It's that joker up his sleeve that really limits the rate that Russia is allowed to lose which is painful to watch as military & civilian lives are lost and heinous war crimes are committed almost daily [deep sigh].
I'm not sure nuke deterrent has any practical role in Ukrainian war. To date. Ukrainians have publicly stated they are not deterred from defending their land by the prospect of Russians using nukes on them (previously discussed here), and Russians can derive no tactical or strategic benefit from using nukes (also previously discussed).
However, even without nukes, the definition of what it will mean for Ukraine to "win" this war remains hazy.
Even if we gave them full use of all US military assets, then what?
That would certainly expedite the process of Ukrainians liberating their territory from Russians, but with Putin and his gang of neo-Imperialists in power in Kremlin, that is unlikely to end the war. Russia will just buy time to regroup, rearm, and attack Ukraine again at the time and place of their choosing.
I don't think Ukraine has enough manpower or resources to successfully march onto Moscow, and THAT is when the nukes might come into play, from Russian desperation. Nor has this been Ukrainians' ambition anyway.
So the only viable course of action for them, and for the West, is to defang Russian military from having any offensive capability to project power for the next decade or so.
From armor, experienced military units, and naval capability in Black sea perspective, Ukraine is well on the way towards that goal.
From airpower perspective, they are nowhere close, but we are largely containing Russian AF with the SAMs.
This war will end when the Russians themselves conclude that the pain of continuing the Ukrainian war of imperial expansion hopelessly outweighs the prospect of any future gains they can achieve with their degraded military capabilities.
We'll see how far along that road we can walk them with Ukrainians' spring/summer counter-offensive.