[kosievdmerwe]

The problem is that as far as I understand Russia claims to be the successor state of the USSR, meaning they want to claim all its glories (and crimes)

Which if true, means that Russian civilian victimization by the Soviet Union is something to hold Russia accountable for rather than a point of mutual past victimization for past Soviet Union states to commiserate together with Russia on.

That's never mind the fact that Russia is committing some of those same crimes now along with waging an expansionist war. The past suffering of an abuser doesn't matter while he's actively abusing someone else.