Personally I have great hopes that an outsider like Kasparov could become President of Russia once Russia is defeated. He did attempt to run for presidency in 2007.
You do read the news? Ukraine is sinking the Russian Black Sea fleet ship by ship with cheap sea-drones. Ukraine is destroying Russian oil refineries and Russia has to reduce it's crude oil production now that India seems to saturated with cheap Russian oil.
On Ukraine ceding territory, I assume that's in case of a peace deal? Putin will sell that as a victory to the Russian people and prepare the next attack a few years later. This simply isn't an option for Europe to allow. Russia will crumble.