Another counterview has emerged from Meduza, the press group which was 'blocked' in Russia as part of their silencing drive. https://meduza.io/en/feature/2022/03/12/has-russia-s-invasio... Apparently, according to Meduza we are only seeing the bright side of things - the news we want to hear. The battlefront has several other shock surprises if you look at the Ukrainian losses. It seems bleeding heavily on both sides…
But they have only one echelon which didn't get any objectives. Given the bad logistics and attrition it needs to take the cities or the war is lost. And even if they take the cities the subsequent insurgency can still kick them out of the country.
Putin simply did not bring enough troops, hoping that either Ukraine would collapse or that the expensive weaponry (cruise missiles, jets, attack helicopters, modernized tanks) would be much more effective than it is. Soviet doctrine talks about requiring 3:1 or even 5:1 advantage against entrenched adversaries, but they have brought about parity, with Ukraine rapidly getting more volunteers and Western gear in the defensible cities.