Hosting Bin Ladin and not surrendering him for an actual multi-pronged attack on the US made the Taliban a legit target. The 20 years was not aggression to own Afghanistan but to free it and it failed miserably just like the Soviets did. Ukraine on the other hand is a modern nation using modern weapons and its own people insist on fighting for their desired freedom and self-agency. Because of the modernity of the weapons, Russia has lost 10 times the fighters in one tenth the time of the Soviet Afghanistan war which is not sustainable.