One consequence of Russia invading Ukraine is that Finland and Sweden joined Nato. Finland has a 1,340 km border with Russia, so Putin has not created a “bigger buffer” - he has managed to double Russia’s border with Nato.
Also, the countries you label as unfriendly are peaceful countries who are only ‘unfriendly’ to Russia because they worry about Russian imperialist expansion, and Russia’s aggression habit.
One consequence of Russia invading Ukraine is that Finland and Sweden joined Nato. Finland has a 1,340 km border with Russia, so Putin has not created a “bigger buffer” - he has managed to double Russia’s border with Nato. Also, the countries you label as unfriendly are peaceful countries who are only ‘unfriendly’ to Russia because they worry about Russian imperialist expansion, and Russia’s aggression habit.