Marvin has the likable-sad-sack thing down cold. He’s tall and goofily handsome, and his air of genial oafishness pairs well with Covino’s more sardonic, misanthropic vibes. They’re like the angel and the devil, respectively, on a Judd Apatow protagonist’s shoulders. The two actors are also best friends in real life, and “Splitsville” is their second ode to manly misbehavior; the first was “The Climb,” a scrappier, nastier affair, from 2020. (Covino directed both movies, each time working from a script that he and Marvin co-wrote.) It’s no surprise that they’ve recycled some of the ingredients here, or that the results, with a higher-budget gloss, taste both slicker and staler. Like the earlier film, “Splitsville” spoons out big lumps of bromantic aggression and self-pity, sprinkles in a few whiplash-inducing emotional reversals, and then pours the whole funny-sad mixture into a cutesy multi-chapter mold, complete with onscreen titles. (Each chapter here is called an “article,” in an arch nod to the film’s nonbinding marital contracts.)journey-inline-newsletterinline-newsletter