I am still struck by how this thing has apparently devolved into some kind of stalemate. Russian forces seem to have little strategy for isolating Ukrainian resistance and cutting supply lines, and the news day after day is mostly the same. The markets can't seem to figure it out either, duh.
Maybe it's the mud, maybe it's poor morale and training, maybe the Ukrainians are just well equipped for defensive purposes, maybe it's tough to take larger cities ...
I suspect some combination of the above. In WW Two, Zhukov would be relieving commanders right and left and throwing more troops at whoever appeared to be making some progress.