I don't think Star Wars fatigue is a real (major) thing. At least not a generale "ugh more star wars, i need a break" rather, its a continual trend of poor storytelling that leaves fans less interested to give things a shot or less tolerant of an occassional missed shot. Every series tends tobhave a dud if an episode here and there, but series are often successful due to the average quality being high, or at least consistent with fan expectations.