Claire Scanlon is a director who’s worked extensively in television comedies. She’s handled beloved shows such as “Brooklyn Nine-Nine,” “Black-ish,” and “Glow,” and she’s commanded inspired programs like “Unbreakable Kimmy Schmidt” and the little-seen “Mapleworth Murders.” It’s this T.V. training that’s difficult to shake, with the film “The People We Hate at the Wedding” missing a certain cinematic touch. Screenwriters Lizzie Molyneux-Logelin and Wendy Molyneaux share the task of turning a 2016 book by Grant Ginder into a workable feature, but they can’t master literary tonality, delivering an uneven understanding of acidic comedy, slapstick, and profound feelings, which all compete for screentime in the movie. “The People We Hate at the Wedding” falls flat, though it periodically comes alive, mostly through performers committed to doing something with dull writing that doesn’t color outside the lines. Read the rest at Blu-ray.com