[nradov]

The Russian problems appear to be at a higher level than just poorly trained tank crews and commanders (although that is a factor). Vehicles are essentially confined to roads because there's deep mud everywhere else until the weather warms up. In order to move on roads with any degree of safety they would need constant extensive air support, but that hasn't been available.

[xrd]

I read that this was a tactic the Ukrainians used: flood the roads with water to create mud that the Russians will get stuck in. So low tech, so brilliant.

[euroderf]

That's also how it worked out in central Finland during WW2. A normally 2-D army was confined to roads, making it 1-D with exposed flanks. The Finns were able to starve them out, with very low losses. Shoot up their field kitchens (vital in the cold), keep'em awake all night with gunfire, and they crumble pretty quickly.