What we're seeing is the failure of multiple levels on the Russian government. The intelligence apparatus for eating their own propaganda about Ukranian weakness, the Russian military for expecting the Ukranian military to not have changed since 2014 and finally the executive level for believing fully the drivel both sides feed them to expect a lighting victory with 150k troops against a million.
They seem to do the exact same mistake again. EuroMaiden happened but they got distracted with the 2014 Winter Olympic. Kharkiv happened but once again got distracted with Vostok exercise. The military chief of staff was at Vostok with Putin. Also from my understanding, the only ones defending Kharkov region was the LPR militia. So really where the hell are the Russians anyway.