They are having a tough time with a rag tag group of rebels. They'd look like the Iraqi army against the Russians.
As one of the rebel commanders said when asked if the Russians had invaded, "if they did we'd be fighting in Kyiv right now".
When the Russians invaded Georgia, they never made it to Tblisi. They turned around and retreated. Now that the same rabid psychopathic gang of Cossaks and Chechens from Russia has invaded Ukraine, they’ll never even make it to the Dnieper River, much less take Kiev.