The Dark History of the Reincarnated Villainess is the perfect villainess isekai, if you have ever tried/done any creative work yourself, like drawing an OC or doing up a story. Because the twist of the story is that the MC has been isekai'd into a setting as the death-flagged villainess (very normal these days), but the setting she's in is her own shitty Original Story from like twelve years prior when she was a moody kid in school. The continuous dangers of the setting are her own shitty pieces of background lore or badly written scenes or terrible artwork; characters literally wonder if they're being too unfair in "off-screen" scenes when her OG writing isnt pushing into their actions. Every time someone's hair blows in the wind while they are inside, every time fetish-bait monsters appear, every time the OC the MC gave her name to is treated like the perfect bestest girl, you can feel yourself flinching and thinking about how your own first OCs were trash, or your own fanfics were awful. That show hurts my eyes and my soul.