Not wrong. As has been discussed many times, the return of Sale, Houck, and Whitlock combined with Bello, Paxton, Pivetta, Crawford, Jansen, Martin, Schreiber, Bernardino, Winckowski, and Murphy should have been enough pitching.
Same goes for the bats of Devers, Dugo, Turner, Yoshida, Casas, Duran, Wong, Duvall, Ref, Story, Reyes, and even McGuire.
I think the 48 games--starting 4 August) with just 3 days off affected the pitching more than I/we expected. It could also have affected the hitting, but I doubt it.
Surprisingly, the arrival of Story improved the defense at a key spot, SS, but didn't seem to help much because the pitching was awful. When Houck got beat up in the 6th inning in his last game, everyone seemed to say, "see, he's awful the third time through the lineup." My rebuttal is, "at least he got to the 6th inning because right now Sale, Paxton Pivetta, and Crawford can't."