Probably the most brutal documentary I've ever seen "Beyond Utopia", which tells the story of how desperate lower-class citizens try to escape from the hell of authoritarian tyranny in North Korea. The most terrifying part was that people would be publicly executed just for using a newspaper with Kim Jong- un's portrait on it to wrap cigarettes in private. Life seems insignificant under such torment.
They are, however, being propagandized that they live in a utopian-like country, and even Kim Jong-un is portrayed as a chosen son sent by God to save them. This pervasive and insane brainwashing is to emphasize the so-called utopia. Yet, the constant fear of having their lives taken away at any moment is a commonplace terror that can be seen everywhere in their lives.
In the end, the son of one of the mothers is caught and beaten to death during his escape attempt, which is suffocating. As those who manage to escape repeatedly emphasize, it's not that people living in this hell don't want to resist, it's that they have never even seen what freedom looks like.
