True, awareness of misinformation is higher today. But, being aware that all channels are polluted with misinformation doesn’t automatically make someone better at distinguish the truth. Also older generation automatically are not buying everything they see https://www.mpg.de/24132917/0205-bild-online-misinformation-...
Actually, having "misinfo everywhere" goggles can push people think that everything is propaganda or nothing can be trusted. This is also one way Russia and China is using its propaganda: give so much multi meaning information that normal governance information is also considered as something that cannot be trusted. Or atleast trying.
You got a point, though I am not sure which things you are referring to. For example https://en.wikipedia.org/wiki/Stasi tried to have tight control in east Berlin but eventually failed. China is doing currently the full scale automated information gathering and control against Uighur Muslims. Not sure how China is using propaganda for the Chinese themselves. Also NSA uses mass surveillance already at the moment for foreigners and internal political opponents.
But propaganda as a weapon is not a thing to underestimate. As investigated e.g. Jessika Aro https://www.igpub.com/putins-trolls/ and some might argue about the role of election interference for the Trump election and re-election as well.
So, if the leaders are dictators and hates people, it wont be good with or without new surveillance laws as there are already existing ways to do that.