How many buildings and infrastructure has been destroyed in Russia? Russia is making good money on high price of oil and gas.
Ukraine on the other hand is unlivable with shortages of heat, bood, housing, power plants, and economy in total collapse.
Not structures, but rather just the cream of this generation's young manhood. What has been the birthrate of this generation of Russians? Since the 1990s, barely one child per family. What does this mean for their future? Crashing population, and the Russian people's demographic death.
How much is a single life worth in Russia? What is a totally ruined Ukraine worth to them?
There is no existential threat to Russia from Ukraine.
Conversely, what is Donbass worth to Ukraine if the people there want to be independent? All their (Ukraine's) infrastructure destroyed and THEIR young people dead for what? Donbas? Let it go.
Both sides are not acting in their own best interests.