You mean Russia wants Poland, Romania, Estonia, Latvia, Lithuania and Finland back (which it had obtained in accord with a pact between Stalin and Adolf Hitler), and feels provoked by the existence of NATO - which is a result of Soviet provocation.
There is no Soviet Union. It’s 2022, so you’re bringing up an imaginary entity. There is therefore no justification for NATO. There is no evidence the Russians want any of the countries you mentioned. What they do want is NATO away from their borders, hence, no Ukraine in NATO, hence a war to prevent it. This is not difficult to comprehend.