It's rather irresponsible for Putin to put his men and soldier in such mortal danger. Putin should just established air superior before sending all your troops to take down Ukaranian targets.
Wheel base or track base infantry vehicle should only be used to hold ground and suppressed some kind of mini conflicts. Not as intense fighting like WW2 and WW1. Infantry should be used sparingly.
The world has move ,but the military tactics has not.