A wonderful piece of analysis on JRE-
IMO, he gets the overall big picture right, but I think he also is wrong about some things. For example, I would argue that part of the reason Russia lacks a road network is precisely
because of their fear of invasion. After what Germany did to them in WWII, and seeing how the lack of roads slowed the Germans down, the last thing they wanted was an established road system that would let the "Imperialist" West be able to drive straight to Moscow.
On the issue of Ukrainian identity, I'm not sure what he means about the Ukrainians developing an identity as of late; they've had an identity for much longer than that. For example, part of what led to Chernobyl happening was the Russification of Ukraine, where they were trying to basically wipe out Ukrainian culture, and so Ukrainian journals that recognized the design flaws of that reactor were ignored and suppressed.
On the issue of trucks for supply, the Western nations also use trucks for supply on land, the issue is the Russians didn't have a lot of trucks in comparison to the numbers of troops and tanks they had/have, and they didn't do any convoy defense to protect said trucks, so they were easy targets for the Ukrainians. He says there has never been a conflict before in Russian history where they didn't pull out until losing at least half a million men, but what abut Afghanistan? They didn't lose any 500,000 there and had to pull out anyway.
This is more a nitpick as it likely doesn't count for modern Russia, but it is absolutely not true that the Russian way to fight has always been to just throw bodies at the problem. That is an old canard that was popularized by the German generals after WWII to excuse the fact that they lost to the subhuman untermensch and because of how post-Soviet Russia, lacking any skill, would fight smaller nations. The reality is the Soviets showed tremendous tactical, operational, and strategic brilliance in fighting the Germans and the Germans showed some surprising ineptitude. The Soviets operated at a higher level of understanding of war than the Germans. Also it is overly simplistic to say that the first year is "always" a shit show. The only reason that was the case with WWII was because Stalin had decapitated the Soviet military. Prior to that, the Red Army was actually among the more sophisticated armies in the world.
The Soviets are who invented the operational level of warfare as a concept, and the adoption by the U.S. military of the operational concept was due to influence from the Soviets. The U.S. Army's Air-Land Battle doctrine (they have since introduced newer doctrines built on this), introduced in 1982, was based off of Soviet operational warfare and involved the study of texts by the seminal Soviet military thinkers on the subject along with study of how the Soviets fought the Germans in WWII.