To be fair propagandists generally don't have to aim high. They only have to shift the undecided and uninformed opinions a little bit.
You want to see some of the crap the agencies were pushing out pre-Brexit and it worked, so I wouldn't classify the average UK citizen as much to be contended with (I am UK as well for ref).
The only good thing to come from Brexit is that for some people they woke up and smelt the more expensive coffee than it used to be and had some self reflection. I have spoke with a good few people now that were like ‘I was lied to’… well duh.
Unfortunately it was mostly "I was lied to, but I agree with it anyway because of X" where X is some loose justification to absolve themselves of the self-inflicted mess they got themselves into.
My father was a fine one. His staff fucked off back to Europe, he couldn't hire anyone else and had to fold his company and retire. Then he found out he got cancer and that the NHS had staffing problems due to Brexit.
Me, I am better off for it as I fill a niche demand, but I voted against it because it was generally bad for society and I do not always vote in self-interest.
Our business lost around 90% of European customers. Then the odd customer now from Europe emails in a rage because they had to pay import duties… so then having to tell them that ‘Brexit’ happened!
You are so right though - most people just will refuse to accept they were taken for fools with all the nasty rhetoric about ‘people coming in to our country’… and so many have even been convinced that ripping up the Human Rights act is somehow a good thing (??? Wtf!).
Rich people manipulating the minds of poor people was what Brexit was all about. At the time I was convinced this was a Russian move to make UK weaker. But then again, I was convinced for many years that Trump was a Russian asset to make America implode (which is kind of what happened).
Same playbook as scammers, you want to focus your efforts where they are most likely to have the desired effect, and those who fall for the obvious lies will always be more easily manipulated than those who require a more subtle approach.
You want to see some of the crap the agencies were pushing out pre-Brexit and it worked, so I wouldn't classify the average UK citizen as much to be contended with (I am UK as well for ref).