There is no point in attempting to predict how things will work out with this invasion of Ukraine. However, we can look at the existing dynamics without too much speculation.
It is reasonable to observe that the Europeans and the world have had the better part of a century to think about what should have been done by the Democracies in the middle and late, 1930s. They are not reacting to the invasion of Ukraine as though it's the, 1939, invasion of Poland. In the last few years the Democracies have reacted much like they did in response to the partition of Czechoslovakia and Anschluss. In, 1939, they declared ineffectual war. They were unprepared. This is not the case now. We've armed NATO to the teeth in addition to direct aid to Ukraine. It certainly appears as though the Russians are the least well equipped and the least cohesive force. We seem to be seeing a lot of Soviet Era rolling stock and hardware. The Soviet Era was a very long time ago. The Russians seem to be falling victim to asymmetrical warfare. They certainly haven't won any hearts and minds. Morale has been reported to be a problem.
Hearts and Minds. Russia is certainly suffering on the international stage for having no real engagement with the various Western media; social and traditional. Sure, they have their bots and almost sleeper cells scattered around but that's nothing compared to a Zoom meeting with the U S Congress or appearances at the Oscars and Grammy Awards. I can't remember anything like that before. It seems to be a new feature of that asymmetrical warfare. Zelensky is becoming a household name in the West. That adds to the unity of the Western Democracies. Hopefully, it makes him safer.
By all accounts, the Russians have been decimated. At least, their initial committed forces. That's interesting but Putin is kinda stuck now.