Without strong will to win, do you really think the meager support from Pakistan would suffice to keep Taliban going for 20 years?
No but without various other enablers the Talibs could not have achieved all they did even if they had the will. That's the point I was driving at.
Back to the Russians; their troops are indeed mostly unmotivated; not understanding why they are even in the Ukraine. As this drags on however it's not inconceivable that some Russians may adopt the "my country; right or wrong" altitude and will be motivated to fight. Paradoxically as things worsen for them; it could lead to an improvement in the will to fight.
On another matter; amidst all this euphoria about the Ukraine's recent battlefield successes; we should not overlook the fact that despite being weak and overstretched; Russia still has a lot of combat potential left [unlike the Ukraine; Russia is still not even fully mobilised] and this war could drag on indefinitely.