War didn't technically "end" between North and South Korea, North Korea is still a pariah state even if we were to accept the Korean war ended many decades ago.
Relationship between Russia and the west will probably be restored at some point but not without a lot of Russians and to a lesser extent Ukrainian getting killed, their economy and infrastructure gutted.
Well, at the current point of time Russia's economy and infrastructure are mostly intact. I'm not sure why is that for a dramatic change.
If you look at Iran, it also has its infrastructure in quite OK conditions - perhaps in better shape than all of their neighbours, and now that may even include Turkey. Russia is larger and has not self-inflicted being a theocracy.
As for the losses of both sides, I'd suggest leaving that to military experts.
As the war drags on we can expect to see escalation in Ukrainian strikes against Russian infrastructure targets such as refineries. Russia is already short of air defense systems and isn't able to provide much coverage for civilian targets. Whether this works will depend on the level of sustained foreign aid for Ukraine.
Depends on if Trump takes the Whitehouse in the fall and how European elections go :-(
In either case, even a Ukrainian defeat means Russia will be a pariah state to countries with reasonable governance. Trade will be difficult and diminished, same as it is with Iran.
Putin&Lavrov have clearly made this calculation and decided this is in their own interests. Whether it's in the interest of the Russian people I think is questionable.
It's interesting that you bring up Iran. They are actually doing pretty well considering that the US stole all their foreign currency reserves (and also precipitated the original conflict in the first place).
Not to mention having their neighbours destabilized into the most insane civil wars, over the past two decades (with gems like ISIS/Daesh having their year or two in the sun).
If anyone's wondering why Iran has its fingers into Syria and Iraq militias, note they've been invaded (with US support) by one, and are allied with the other.
Kremlin will just use those attacks as an excuse to occupy larger parts of Ukraine. Bombing of Belgorod is now used as an excuse to create "demilitarized zone" that includes Kharkiv (second largest city in Ukraine). I guess another "demilitarized zone" will follow in Odessa, after some attack on Crimea.
With the current rate of attacks Ukraine is not able to cause any noticeable infrastructural issues, and anything beyond approximately the Volga river is not reachable by any weapon systems.
It's sort of a moving target like "How long would it take for Freddy Krueger to kill all Chinese teenagers"
Relationship between Russia and the west will probably be restored at some point but not without a lot of Russians and to a lesser extent Ukrainian getting killed, their economy and infrastructure gutted.