This pretty much. Yes, WW2 saw 60M dead, over the course of 2.000 days of war, including many many civilians and people murdered in concentration camps. 1k dead soldiers per day is nothing to scoff at, not even for Putin. Sure, they will take Kiev, but boy will they bleed. He surely overestimated russian capabilities and can only hope to be done with it before griefing russian mothers tear him a new one.
Once this is over, one way or the other, russia will be a lot weaker than before, considereing all the aspects.