Yet Russia took Soviet Union embassies. Even those that belonged to other countries before USSR annexed them. As well as grandfathered USSR seat in UN security council.

Kaliningrad was also given to Soviet Union Even though it was attached to Russian Federation to work around this. If Russia ain't Soviet Union successor, Kaliningrad should be no man's land or returned to Germany.

Talking about Estonia.. When Estonia tried to relocate USSR monument, it was Russia which objected.