Almost certainly. This Liverpool side looks completely deflated, kind of like what happened with Dortmund in the last season under him after three or four exceptional years.
Abstaining from rotating the squad last season has come back to bite Klopp in the arse. I wouldn't be surprised if some of the top players decided to leave at the end of this season because that style of play is so physically demanding it has broken some of those players. A squad rebuild is required and Liverpool simply don't have the resources to make that happen at the moment.