The DPRK is a lot more culturally, economically and politically isolated than other AES states. It's easy to counter propaganda about, say, Cuba, because despite the USs best efforts Cuba does have some stronger geopolitical allies who are willing and able to counter the more egregious disinfo about them. The DPRKs allies are all states the West hates and doesn't take seriously.
The DPRK is a lot more culturally, economically and politically isolated than other AES states. It's easy to counter propaganda about, say, Cuba, because despite the USs best efforts Cuba does have some stronger geopolitical allies who are willing and able to counter the more egregious disinfo about them. The DPRKs allies are all states the West hates and doesn't take seriously.