At the time of last Polish-Russian war in 1792 there was no such thing as propaganda, only historic paintings and may be pamphlets.

Then, I can't remember any anti-Polish propaganda in Russian Empire, hardly it existed since Poland was part of Russian Empire at the time when such thing as propaganda had become a thing.

Russian Empire war propaganda looked like this: https://topwar.ru/uploads/posts/2010-10/1287974763_951e010810.jpg

There was only Soviet caricatures mostly anti-capitalist, not really anti-Polish. Something like this - http://redavantgarde.com/content/placard/1276/1276.jpg Factual, but poor graphically.

Then, after WWII Poland become part of Warsaw Treaty, so there again was no sense in anti-Polish propaganda.