You're right about the coping and seething we'll witness when this is done but this part is optimistic on the other end of the spectrum.
I'm not an expert so I'm obviously relying on the Russian liberals, but Donetsk and Luhansk already rely on gibs. It's like carving up puffer fish and gobbling up the viscera.
This alignment with China... I don't see how this is going to end well for Russia. What the hell is going on with the rolling lockdowns over there? Oh, they're "amused" with the West dumping old weapon stockpiles in the middle of a recession? They're locking entire cities at home. That's worse for the economy than giving away the stuff that was going to end up as foreign aid anyway.
The territorial gains Russia will receive are strategic and not economic, creating more territorial buffers between Moscow and the borders of NATO. Even annexing Southern Ukraine is of immense value. My earlier post about them following a "Solzhenitsyn" path to a Greater Russia is what I think they ultimately hope to achieve. Eastern Ukraine, Belarus and Northern Kazakhstan to be added to the Russian Federation.
I could muse further about their European strategic situation, and how they could rebuild some sort of alliance system within Europe proper but it would be speculation. If Russia was to take more of a bite out of Europe to take advantage of Western Europe, the submission of Moldova would be the next logical step. I recently travelled to Romania and was surprised by the amount of Graffiti that I saw of "Bessarabia E Romania". I wonder if the Russians would dissolve the state of Romania, keep Transnistria and offer the rest of Moldova to Romania who would be very happy to accept. This would allow the Russians to extend influence into South-Eastern Europe with Serbia and potentially Hungary. However this part is fantasy football.
As for China, I am not trying to build them up. The Chinese would serve as a hub for which the Russians could sell to the world, receive goods and basically go around Western Embargos. China is probably feeling kind of cozy right now in regards to Western weapons being sent to Ukraine. The media frames it as "aid" but these aren't stockpiles of spare weapons, I know countries like Canada and Poland have sent weapons that they themselves need abroad. We're talking weapons that should be reserved for actual militaries leaving their own troops without any. New weapons will have to be bought, but the West is in economic trouble right now and this will have repercussions further on the economy.
As for the lockdowns in China and the civilian economy, China isn't a free market nation. Their people also don't have any illusions of freedoms or rights. I have a longtime friend in China who speaks about the situation there from time to time, they could lockdown whole cities and aside from people raising their fists in frustration, the population would rather pay bribes or suffer quietly than politicize it unlike people in the West.
Russia and China both are Great Powers but not Superpowers and neither are under the delusion they are. They're acting to take advantage of the weakness and declining Superpower that is the U.S. Many English speakers want to believe the West or NATO is like some 30 year old boxer in his prime, when he's now an 80 year old man with arthritis and dementia. Russia or China don't want to beat him up and go to jail like the media seems to meme, they want to get him to change his Will so they have a bigger piece of the pie when he dies. Sometimes this means pressing him.