If you are leaning towards the former then this could be extended even further: Soviet Union only ever harassed itself. There were no occupied Baltic states, there was no Ukraine, etc etc - just one big happy family called USSR.
No, you just constructed a false dichotomy.
Russian Empire and its successor states USSR and Russia is a product of imperialism that was born in Kiev when Grand Prince Vladimir has brought Orthodox Christianity to those lands. This imperialism conquered some territories, lost some territories (Kiev proper), then regained them back and conquered a lot more, then splintered. The current war is the result of the imperialist successor of the original Kiev regime to gain Kiev back.
If you hold another opinion - that Ukrainians are mixed descendants of people who came to live in this area in ~15 century after it was devastated by Mongol invasions and later steppe nomads plundering in 13..14 centuries, then no, Russia could not have harassed it in 'ancient' times.