This show honestly hasn't been good since its first season, one filled with tension and the unknown as a rag tag troupe are forced to navigate through a zombie apocalypse. You wanted to see how they would survive and what caused the zombie infestation. They could have kept it interesting by you know, giving the gang a goal and hence a central plot line to strive for-- something like "if we get to military base X, they are working on a cure", but instead it's just a big nebulous "survival" soap opera with no ultimate end game to anticipate. Season 2 felt like Little House on the Prairie with zombies. This season it's a human vs human turf war with zombie accessories. With the exception of them deciding to take over the prison, I can't think of any episodes this season that haven't been entirely forgettable.
I keep watching for the same reason other do, it's a zombie show on TV, but I can't believe what a total 180 they've done in terms of story/characters since the 1st season.