system
Given the following post, respond as if you're commenting on Reddit:
human
[General] What's the most horrible prison in all of fiction?

Like Impel Down is pretty bad with its five floors of hell and Chronicles of Riddick has a pretty bad prison system.

But what's the worst in fiction?
gpt
Azkaban has to get a mention.

Its a dark, cold, wet, basically inescapable place, guarded by horrifying, soul-sucking demons that make feeling happiness literally impossible. Hope, joy, etc... all of those emotions simply cannot be felt once Dementors get a hold of you.

Stay exposed long enough and apparently Dementors can also make it harder/borderline impossible to remember happy memories.

The prisoners of Azkaban are essentially robbed of all happiness, hope and positive experience. It's a prison explicitly designed to inflict depression (which makes some sense in universe - depression is one of the few ways to significantly dampen a wizard's powers), and forces its inhabitants to stew in a cesspool of their own worst memories.