I don’t understand this logic. How is it in interest of the propaganda machine to make it appear that common people are against Putin? Surely they want to portray that majority like him and support his actions (which is also why they manipulate these stats you linked).
Also, Putin and his elite don’t actually give a damn about sanctions affecting “common people” (see eg post-Crimea sanctions), so I don’t see why they’d worry so much about it as to fabricate every single post on Reddit.
Accurately predict the future, huh? Are you a fortune teller?
What you’re describing is nothing more than a hurtful bias, and please call it as such.