This can be said of any year, with any show. It's not that "the Japanese have shit taste," it's that the popularity of any given show is not merely derived by how good the actual material is.
Here's a hypothetical: Show A is a lazy mobage to anime adaptation where the entirety of the show is mindless filler and has zero plot or character development. Show B, however, is a faithful adaptation of a manga. Nevertheless the advertising budget of Show A is 5x greater than that of Show B and has better timeslot placement. Obviously, then, Show A is going to score much higher than Show B. By sheer numbers alone, even if Show B got better ratings, by virtue of the fact that far more people saw Show A, Show A will inevitably do better in popularity polls. This is why shows that you might dislike or even hate, like Sword Art Online, will usually do much better than passion project shows. At the end of the day, most of the time it's just a numbers game.