I believe Johnson reiterated that to some degree around training camp. IIRC. And it was more than just saying “insert rookie here has to earn his spot,” it was “Caleb can’t be bringing that Hollywood stuff here.”
I do think there was something to the veterans being frustrated with the lack of accountability re: Caleb, but it seems that wasn’t just a Caleb issue, it was one across the board. Even PAMan seems to be conveniently forgetting he heard (a former GM?) say that he feels (or heard?) Caleb thought it was going to be easier than it was. Remember, Caleb promised Tory Taylor he wouldn’t be punting much.