The russian military has proven to be quite adaptable. From WW2 up to Syria. Compare how badly they did in Afghanistan and Chechnya 1 vs Chechnya 2 and now Syria. Look how quickly they destroyed Georgia, how quickly they took Crimea. It's like comparing 1940-1942 Soviet Red Army to 1945 Soviet Red army. I'm not saying they are as good as NATO troops but they are getting much better at modern warfare.