I don’t think people are actually tired of zombies and zombie stories. I think they’re just tired of seeing the same stories and characters over and over.
We’ve seen the law abiding white dude who’s slowly corrupted to an evil dictator. We’ve seen the small group who turn on each other over food and internal conflicts. We’ve seen the anti-social asshole who goes around killing zombies and committing crimes because he can.
There’re so many possible stories in the zombie apocalypse setting, but writers keep coming back to the same archetypes and formulas.