I think the meme is attempting to disparage the “ungratefulness” of present day liberals in these FSU countries

Yes, well this is basically Russian diplomacy propaganda 101 - “I did this and that for you and now you’re ungrateful”. Similar stuff abusing husband says to abused wife. Basically if russians helped you in any way in history, you’re supposed to be their vasal until the end of the universe, there’s no expiring date on that. It’s abusive and disgusting