It’s the ultimate reader betrayal. You discover a concept so brilliant it gives you chills—a jaw-dropping magic system, a sci-fi world teeming with impossible ideas, a plot hook that sinks in deep. You’re all in. Then, the author completely fumbles the execution. The masterpiece you envisioned devolves into a train wreck of flimsy prose, inconsistent characters, and a plot that wanders off a cliff. The potential was legendary; the result is a tragedy. We've combed through the most heated threads on Avonetics to uncover the books and series that users agree are the biggest heartbreaks in fiction—stories with god-tier concepts that were tragically undermined by bad execution. From epic fantasy sagas that fizzled out to standalone novels that squandered a killer premise, this is the definitive list of missed opportunities that still make readers rage. Did your favorite make the cut, or is it the prime offender? Prepare to see some sacred cows get tipped. For advertising opportunities, visit Avonetics.com.