I am not disputing that a bunch of stories being put out by the Ukrainians are propaganda, and not believable. That's pretty normal in most wars, and people should be taking all those claims with several grains of salt.
But that is a completely different issue from the accurate information available to the Ukrainian commanders regarding actual Russian troop movements. They know the difference between what is truth and what is propaganda even if the public does not.
I think this propaganda shows the weakness of Russian military.
It is getting hammered by US made Stingers and Javelins.
The occupation will be far worse for the Russians.
These hand held weapons have made defeating insurgents impossible.