They weren’t even using Soviet tactics. Those tactics stressed the need for encirclement and artillery bombardment which was largely ignored early on in the invasion. Many lives could’ve been saved if Russian soldiers didn’t rush into urban centers. It seems that the commanders have gotten to their senses and started using their brains in planning their next moves.
It seems as though the Russians forgot how to apply the tactics that they used in Chechnya on approaching Grozny with regards to approaching such cities as Sumy, Chernihiv, and Kharkiv that are relatively close to the Russian border. They were very cautious and methodical during the second war there... Granted that they do not intend to unleash the same extent of destruction as they did on Grozny... Not anything close to that...
But in the first week of the invasion, it looks like they just rushed their advance without taking into consideration the need for drone defence and anti-armour defence, or undertaking extensive preliminary bombardment of locations near and around where they'd establish forward operating bases for siege warfare...