Robert Fuller’s review published on Letterboxd :
Doesn't pass my "Would this be of interest if it were fictional?" test for fact-based movies. The problem, as it was with In Cold Blood (the movie), is Perry. Richard Brooks tried too hard to make him sympathetic, while this movie doesn't try hard enough. He's too much of a cipher, an articulate but otherwise insipid prop, and honestly I have no idea what Capote sees in him. Consequently, Capote's ambivalence between self-serving manipulation and genuine love and affection doesn't really pay off dramatically, and his supposed emotional torment is hollow and unconvincing -- which actually could have added another layer to the film, if only Dan Futterman were a better writer. I hope Foxcatcher was the last of these Miller-Futterman murder tell-alls, because they suck at them.