You can't sum up highly complex topics in one sentence? Shit! ;-)
On a more serious note, I would have counted the Russians in the group of competent armies. Maybe they were during the cold war, Afghanistan is not really a good measure. Maybe they were not, no way to ever find out. All being said, I'm happy that we never found out so far. Because one thing is sure, finding out involves turning whatever region is used to find out into a war zone.
I grew up a military brat, and have studied this shit for years. While I never thought the Russians (or Soviets) were 10ft tall, I never in a million years thought they would be this utterly incompetent. I have some Estonian friends who were concerned about Russia steamrolling them before NATO could really respond (they joke that Russia considers Estonia a suburb of St. Petersburg). And I always empathized with them. No strategic depth, minimal forces, ethnic Russians in the Baltics who could be used by Putin as a casus belli. And NATO seemed sclerotic and weak.
Now? I think that NATO could easily handle almost anything Russia could throw at it, short of nukes.
It really is amazing how poorly they've performed. And the BTG concept has been utterly disproven as a brittle, unsustainable force.
On a more serious note, I would have counted the Russians in the group of competent armies. Maybe they were during the cold war, Afghanistan is not really a good measure. Maybe they were not, no way to ever find out. All being said, I'm happy that we never found out so far. Because one thing is sure, finding out involves turning whatever region is used to find out into a war zone.