You're talking about the atrocities of the Soviet Union. Yeah, the Russians suffered under that regime too, remember? Millions of Russian Orthodox martyrs.
While I agree with much of your analysis (not all), downplaying the institutional connection between the Soviet Union and Russia is a quite a bit off the mark.
Putin was head of the KGB, and reminder: the Russian Orthodox Church to this day still refuses to condemn Patriarch Sergius - even in like 2019 or so building statues to him and blessing him with holy water - the infamous "venerable" Patriarch who issued a declaration saying that the Russian Orthodox Church's goals are identical with the Soviet Union (using such effeminate language like "your joys are our joys and your struggles are our struggles"), and said all those who disagree are anti-social parasites whom Saint Paul would condemn.
Putin himself has stated on numerous occasions that Russian Orthodoxy continued on in secular form through Communist culture - egalitarianism and brotherhood, people venerating Lenin's relics, iconography in Soviet art, patriotism, etc.