I do not see much evidence that Ukraine will just shatter the second it stops getting western support, though. Of course they'll be disadvantaged, but it's not like they're the ANA, is it? I wrote here about it a bit so I wont bother repeating the comment just to save us both some time lol.

Russia can gain more advantage by waiting things out but even if the west stopped supporting it they still have no route forward to 'total victory' as the Russian leadership imagined (quick and easy replacement of the Ukrainian government with one friendly to Russia and beholden entirely to it), just a slightly more advantageous occupation of some parts of the country. Ukrainians wont just give up though, taking big cities is an immensely difficult thing against a dedicated defender and the further in they get, the more difficult it is to defend supply lines.

It's based on the US being in it only half-heartedly. Frankly speaking the US withdrawing from the conflict could end it because Russia will stop once it sees that Europe doubles down (after a moment of shock and denial about us being US puppets etc), but so would America actually committing.

Where are the damn ATACMS, America? Guarantees of delivering Abrams for years on end no-matter-what?