False. Putin's position and reason to invade Ukraine was to cause a regime change in Ukraine. Putin himself has openly said that much.

Russian self-determination in Ukraine has nothing to do. And in any case that ship has sailed now with the aggression. Remember how the Baltics and Poland and Bohemia were completely de-Germanized after the war.

All you ifs and buts are meaningless next to an active unilateral military invasion. There is not justification for it, especially when Putin can't even say he represents the interests of Russia. He is a kleptocrat that owns the State like a feudal lord. "Russia's interests" are unknown and more likely than not at odds with Putin's.