@AM64 ...; You are (supposedly) a smart guy. You do know we've been down this road before, right? How did this slow down Russia the last time?
All I've got is opinion. but here goes. Russia really wanted the eastern end of Ukraine for several reasons, but one has to do with Crimean access. Crimea has to do with Black Sea access. If you read much about sailing during the 1700 and 1800s, you begin to understand how difficult it is moving ships around when the capes at the bottom of Africa and S America are concerned. The Suez and Panama canals ease that; but for a navy to project power, unfettered access to bordering oceans is everything and Russia especially for its size doesn't have it. Russia to a great extent is largely landlocked and screwed.
There's plenty of Artic access, but much of that is not ice free. There's very limited Baltic access, and the Baltic itself is not much better than a big lake with a stopper. The UK is right there to limit Atlantic access from the Baltic, too. Go to the other end of Russia and the best sea access is Vladivostok. We've had discussions the last week or so about how Russia came up with what seemingly should be part of China, and how it looks like it could be China's for the taking. Come out of Vladivostok and there are limited sea lanes either up through the Kurils or down around Japan and Korea. Again not real friendly territory.
That gets back to the Black Sea and the fact that Ukraine is in the way. Russia annexed Crimea as part of the solution, but then there's the part about how to get to Crimea. This is a roundabout way of getting to an answer. Putin believed he could take Ukraine or at least the part really necessary, but it didn't work out the way he planned. Ukraine wasn't really prepared to fight when Russia invaded, but it didn't collapse either. What looks to be happening is something similar to but not exactly like an insurgency. Russia may be the bigger force with the ability to build weapons and munitions for fighting forces, but it's unable to deliver a sustaining blow. We won the battles in Vietnam and lost the war because there was never a peace. That's happening in Ukraine. Russia may hold important tracts of land (and a bridge), but Russia doesn't have free access as this new bridge strike shows.
The question isn't so much how any individual event slows Russia, but how long the two sides can keep it up and what the cost is to Russia overall. The Russian economy is suffering - deny it if you like, but Russia in this regard is in a position very similar to times we've faced. We had all the marbles and walked away with a loss. Russia had its Afghanistan. The bigger power isn't always the winner; the little guy has to keep punching, and it's very effective when the land where the war is fought belongs to the little guy. I think Russia is also facing a huge loss of face, and the Russian annexed states that were previously part of the USSR are likely to move against Russia because of what's happening in Ukraine.
That's my view, and to be honest I don't know much about Russia/Ukrainian history, and I don't read most news stories about this war. Primarily stuff from
The Drive, so my aspect is just a lot of what I perceive. I just try to figure out what my thoughts would be if I were in a certain position. For Russia: they've got a huge country, lots of resources (questionable on the people part of that), a lot of leftover ego (in people like Putin) from the height of the USSR, very little sea access for trade and military might ... A wise person would probably forget the old days as a world terror and use what he has to build a prosperous country blessed with a lot of natural resources - and most of all develop a democratic type country free of corruption (government, thugs, and those who got away with the USSR's treasury and holdings).