Jim Carrey, who seems more interested in political painting than any sort of acting these days, doesn't really "make movies" anymore, and when he does, they turn out to have a 0% Rotten Tomatoes score (like the forever delayed and finally released "Dark Crimes").
Post-Eternal Sunshine ('04), Carrey has had one misfire after another: "Fun With Dick and Jane," "The Number 23," "Yes, Man," A Christmas Carol," "Mr. Popper's Penguins," "The Incredible Burt Wonderstone," "Dumb and Dumber To," and the aforementioned "Dark Crimes." There were two exceptions during that 14-year time-span, the underrated indie "I Love You Phillip Morris" and his supporting role in "Kick-Ass." That's it, that's all.
In "Kidding" Carrey plays a children's show host that experiences a serious mental breakdown.
Here’s the official synopsis:
"In his first series regular role in over two decades, Jim Carrey stars as Jeff, aka Mr. Pickles, an icon of children’s television, a beacon of kindness and wisdom to America’s impressionable young minds, who also anchors a multimillion-dollar branding empire. But when Jeff’s family begins to implode, he finds no fairy tale or fable or puppet will guide him through the crisis, which advances faster than his means to cope. The result: a kind man in a cruel world faces a slow leak of sanity as hilarious as it is heartbreaking. Starring Jim Carrey, Frank Langella, Catherine Keener and Judy Greer. Don’t miss the series premiere of Kidding Sunday, September 9 at 10/9C on SHOWTIME"
Frank Langella, Catherine Keener, and Judy Greer complete the cast. 
Pitt and Ayer disagreed so much on the tone of the film that each prepared separate versions. Ayer's "broader cut" tested better, but Pitt's more “esoteric” version drew the support of producer Damien Chazelle .