If that were truly the case, the red army should not have entered Afghanistan in the first place and kept their little claws to themselves. Now that they entered and created chaos and conditions for civil war, it was on them to clean up the mess.
Moreover, red army was not really shedding all that much blood. They were sending Afghan army to the dangerous fronts--basically to die (my father was one and he told me how the Russians sent them off to an ambush. When the Afghan army halted because they knew they were gonna die, the Russians began shelling them in order to push them forward.).
In any case, the problems were created by Russians and it became their responsibility to fix it. Moreover, they had agreements and treaties and Garbageoff reneged on those.
To the little boy who lost his childhood and future because of his strategic stupidity he is guilty of deceit, incompetence and inhumanity and I will not stop praying that he continues to burn in hell for it.