Russia will destroy everything. Then what?
Russian Nazis want Lebensraum. If Ukraine, the second biggest country in Europe, is erased as a modern society all the better in their view.
Putin has mocked this idea, because it really is stupid. Russia of all countries doesn't need more acreage. What is does need is security against hostile and aggressive armies on its borders. The anti-democracy coup in Ukraine in 2014 showed the NATO aggressors would not be stopped by political appeasement.