Doesn’t really matter as Russia has a history of just winning through attrition. Look at WW II , Russia lost over 8.5 million troops vs Germany’s 5 million (and that 5 million was on all fronts)
That didn’t show up in Afghanistan, though.
There is the small matter that Germany was fighting a two front war, that Soviets were sustained by western aid, and west was attacking German infrastructure degrading their abilities.
Additionally if the war had continued at the same pace for much longer even the Soviet Union would have run short of troops.
Todays muskova is not their fathers Soviet Union.
Don’t recall people from Napal, Cuba, China, Syria…. Fighting for Soviet Union