Russia legally declared itself a successor to USSR, took the UN seat, nuclear weapons, assumed debt and foreign assets, kept contacts with former communist allies like Cuba, so it’s not completely wrong. The topic of admission of Russia to NATO demonstrates this very well: Putin thought that Moscow is peer to Washington D.C. and needed special invitation (as if USSR resolved hostilities and wanted to partner with the Western bloc). NATO was treating him like any other country in Eastern Europe: apply and we will think about it — didn’t even bother to formally invite (IIRC Stoltenberg basically said in one of the interviews that even if the door was closed, the doorbell was working).