It didn’t work in Afghanistan for the larger USSR and it won’t work against Ukraine who is armed technologically and killing massive droves of a diminishing resource, young Russian men. Not only that but this is an optional war for Russia so when things like the Kremlin, Hermitage and relics of their culture get ruined the nonsense will come home. The only reason it’s taking so long is Putin is an irrational narcissist who can’t cut his losses in time. It’s also called foolish. Even with a victory he has millions of new enemies who speak his language who can ruin Russia from the inside like a slow poison. Fools.