The Russians couldn't even defeat the Taliban in Afghanistan. Now, they try to turn defeat into victory. Putin is good, Russia is good, but neither are that good.
Without the Nazi help, they like the U.S. wouldn't have any missile systems.
Taliban was defeated by the Russian (and Iranian) clients from Northern Alliance with American help. So it was a joint US/Russia/Iran venture :)
Soviet Union (with Russia being the largest part of it) was bogged down for several years in Afghanistan because the insurgents were getting help from USA. (Same way as Viet Cong was getting help from Soviets and China).
Usually guerrillas need help from outside, unless they have very strong support in large local population.