You already hear Putin yammering about NOT fighting NATO which would be like a one arm boxer with his eyes swollen shut deciding to then fight Mike Tyson. Afghanistan "beat" the Soviet Union inflicting FAR less damage so I'd imagine this war is getting unbearable for Russia and for no actual result other than ruining his international relations, decimating his beleaguered army, chasing off a generation of smart young people and Ukraine is going to get funding and weapons from 35 nations UNTIL Russia relents like the Soviets did. The pressure will come from within Russia and Ukraine will just raise it.