Do you know why Russia is hitting Ukraine's oil storage facilities, supply depots and repair shops? Because that is the actual key to maneuver warfare. You need fuel, parts and their distribution to do anything, otherwise it's the experience of the PVA in the Korean War: even if they succeed in an ambush, the UN forces can literally just drive in the opposite direction and unless you shoot them right then and there, they'll get away. Meanwhile in Vietnam there was jungle and swamp everywhere, so if you got stuck in a battle, there's nowhere to run.
Each day that Russia fails to significantly escalate this conflict via national mobilisation is a day closer to Russia's defeat, most likely in the form of narrowing objectives to securing the Donbas and declaring this to be "victory". Russia is trying to fight this war like the US and its allies did their various wars of choice over the past generation, i.e. with little to no impact on the home front. It has not worked and will not work, not when Ukrainians are fighting under conditions of national mobilisation, when they are being resupplied by the west, and when Russia has demonstrated little to no ability to interdict those supplies. If Russia is not willing to mobilise its population for war, and not willing to bring out the nukes, then this is over and the rest is detail.
Russia now has the advantage of having fuel where they need it, and Ukraine doesn't. It doesn't matter how many ATGMs Ukrainian side have if the only way they have of deploying it is with pickups and SUVs.