They are using dumb bombs and artillery now placed well away from any harm this is in line with the doctrine that worked for them when they destroyed Berlin in 1945 from the safety of the Seelow heights, there they used over 9000 guns and rockets to flatten the city, and now here in Ukraine having tried to walk in to the cities and failed they are standing back and launching artillery barrages to destroy everything, the downside for them is that tanks don't do well in an urban environment destroyed or still standing, this will be why Ukraine wants aircraft to kill the artillery.
Once destroyed they will have to go in and fight street by street building to building in the rubble that remains, very heavy Russian casualties will ensue, typically you need a three to one advantage to take a fortified position or building.
Putin is just crazy enough to destroy everything and leave it a wasteland, why would he bother to risk his army when there is nothing left, when its become a buffer wasteland between Russia and NATO which he wanted all along.
Meanwhile the rush to join NATO is on and defense spending will reach new heights, Russia is assured of becoming an economic wasteland for the rest of our lifetimes and beyond, their infrastructure will crumble even their nukes will become nonoperational after a time with no money coming in the country, maybe there will be a mass exodus of Russians when it becomes too hard to live there, after all who can live with no McDonalds 555555555555 Putin will be very proud having presided over the destruction of his own country, agro economy N Korea style here we come.