The best commentator I have seen of all the reporting of the war is military expert, Professor Michael Clarke, who appears now & then on Sky News. (google it for videos)
He said the great fault with the Russian Army is a lack of effective NCOs. The generals are largely incompetent drunks out for whatever they can make & put there by Putin. Between them & the soldiers creating the mayhem, the NCO structure is very poor, a state which allows them to run wild & out of control.
Whereas in the British Army for example there is a very tight structure of command;
https://www.army.mod.uk/who-we-are/our-people/ranks/