I mean, mediocre is an interesting word to choose. He has had some solid second-tier roles to get to the point that he has, once he broke through on Silicon Valley, then more offers started coming in.
If you are referring to the kids movies as mediocre, idk what to tell you, cause How to Train Your Dragon was wildly successful and a solid animated movie, and Emoji Movie will probably be pushing box office records solely on its name along whatever you think of it.
He was great in Cloverfield, Big Hero 6, She's Out of My League, and Deadpool were all solid characters. I guess I just don't understand how you felt about his stand-up means he won't be successful or get any other acting gigs going forward now that he is off Silicon Valley.