Sorry, but your gonna have to explain why they are sitting in a giant strung out queue that largely negates any numerical advantage and removes all freedom of manoeuvring, rather than getting themselves off a (very vulnerable) single highway and into a useful position for either defending themselves or attacking Kyiv.
Talk is:
That convoy largely left Belarus with 3 days supplies thinking it'd be a walk over. That was what, 8 days ago?
The Ukrainians attacked and took out the lead vehicles.
The mud stopped the Russians getting around them (and I assume, same for clearing them off road - don't quite know how that's been a problem - do they not have winches?).
Now, many vehicles are out of fuel.
The troops will shortly run out of food.
The Ukrainians aren't really attacking them as soon its gonna become a massive disaster the Russians somehow have to handle, that convoy is shaping into a disorganised retreat (on foot) back across the Belarussian border to get food. Or officers shooting troopers for disobeying orders.
Or, quite possibly, the talk is rubbish - and by extension, all the above is rubbish. But given the hard evidence of Russian incompetence to date (trying to run field ops via unencrypted radios... like really?) - then I'm betting for, rather than against.
If it were you - would you be happy to be still be sat there on a single highway knowing if there is any attacks, you don't have freedom to manoeuvre?
[and I do appreciate where your coming from, both from your background and quoting Soviet doctrine]