For years, TV shows have enjoyed a golden era of quality—until they don’t. Sometimes the decline is slow and hard to notice, but other times it’s clear-cut with a specific season, episode, or scene marking the drop from good to bad. Some fans stick around, hoping things will improve, while others are so disappointed that they quit watching.

Glenn’s death on The Walking Dead

Even though comic readers saw it coming, Glenn Rhee’s death in *The Walking Dead* was too much for some fans. Glenn had been the heart of the show, and despite the showrunners’ attempts, no one could fill his shoes. His brutal death at the hands of Negan led many viewers to switch off in large numbers.