Perhaps the most addictive sub-genre is the "production hell" story. Lost Soul: The Doomed Journey of Richard Stanley’s Island of Dr. Moreau is a masterpiece of disaster. It documents an actor (Brando) going insane, a director getting fired but hiding in the jungle, and flash floods destroying sets. We watch because seeing brilliant people fail spectacularly is oddly reassuring.
The "Netflix Effect" on Non-Fiction: How Streaming Algorithms Shape Documentary Narratives.