Manglehorn is an art piece with capricious writing. Al Pacino's role as Manglehorn is lavish. Pacino graces the film with his present, saving the movie from becoming forgettable. The supporting characters are very generic, as they weren't given quality material to work with. The supporting characters serve as background noise to the conundrum that is Manglehorn. Despite this, the supporting cast does a great job portraying these characters. The cinematography of this film is rich, matching the poetic tone of Manglehorn's love letters. The film's biggest flaw is it's writing. Manglehorn is written as a character who no one can fully understand or entirely relate to. The character contradicts himself on all fronts. Some of the supporting characters are entirely irrelevant and pointless. Manglehorn is portrayed as a "great man", when in reality he's stubborn and incredibly hateful. The story following Manglehorn is nonsensical and the central conflict resolves itself in a lazy manner. Overall, Manglehorn is a poorly written film with strong acting and graceful cinematography.