Two intangible things happen, it got too popular for its own good, and the backlash to Glen Rhee hobbled the writers ability to take risks. This show also avoided a lot of the darker elements and big event arcs from the comics. The show just got too soft, and too melodramatic. The new showrunner (Angela Kang) for season 9 was a breath of fresh air, but the damage was done by then. A show like this could've in theory go on indefinitely. But by season 11, people wanted it to be over. Then there was the filler eps, the lack of actual horror, the refusal to fire Gimple. In fact Gimple is still over the franchise to this day. He's AMC's yes man. I mean how else could you desribe him? Also there was a time when Fear The Walking Dead was arguably better then TWD. But then it fell victim to changing showrunner too. 🤷🏾*♂️ Also in MY unpopular opinion Carol and Daryl should have died at some point. Just like Cersi Lannister over stayed her welcome so did Daryl and Carol.. The plot armor was just INSANE. Btw season 3 of Fear The Walking Dead was genuinely good before it too fell apart after a retool to make it lighter and softer.