Honestly, Domnhall is legitimately really good in it. He's basically just as insane and psycho as General Hux, and when it comes to one-liners, reactions to Peter's antics, and slapstick, Domnhall almost always hits the mark. He also has great chemistry with Rose Byrne. Honestly, if the film was just a romantic comedy with those two, it would have been rather cute. But instead, it's a movie that has an unlikeable, annoying jackass as its main character, played by an unlikeable, annoying jackass in real life, while infused with stupid pop songs, and a lot of largely unfunny self-referential humor.