I feel like Russia getting off to a slow start is kind of par for the course though. It feels to me like the Russian military is always, for lack of a better word, sluggish and clumsy at the start of the war and takes some time to warm up and figure things out. So while the start of the war might be a disaster for Russia, they do have the stamina to fight it out and harden. From my admittedly amateurish position as armchair general, it looks much like the same pattern the Russians followed in every major war since Napoleon.