Season 6 at the moment. And I just finished Ep 10, the most boring and stupid episode I've seen so far. And as far as I can remember (can be wrong), the next three episodes are also quite meh.
Probably, these are the “warning signs” indicating the show’s impending decline into dull garbage. Back then, I quit around season 8, and I remember already strongly disliking season 7 when it was an ongoing.


*I immediately think of all those shit-eaters whose rating lists I keep coming across, where McCarthy’s zombie episode is often listed as the “worst” of the season.