The movie takes liberties with the story of a notorious communist guerrilla who operated in Brazil, and it’s not really meant to be taken as a true account of his life or as a documentary. The director, who is related to the man himself, fabricated numerous scenes and events apparently to portray him as a heroic figure. Even though there's an attempt to present Marighella as relatable and sympathetic, trying to depict him as just a regular person becomes overdone and feels forced. This contrast between his everyday side and his historical role is noticeable throughout the film, creating a tension that undermines its credibility and turns it into fiction. The actual individual who served as inspiration for the character was not Black, but in the movie, efforts to portray him with compassion and emphasize equality overshadow any acknowledgement of his actions – he was accountable for numerous violent killings during Brazil’s period of military rule (1964-1981). Ultimately, when a film prioritizes political messaging over artistic merit, the result is a disappointing picture presented as something it's not—a documentary showcasing only one perspective on Brazilian history and attempting to rationalize acts of violence stemming from political disagreement.

Source on TMDB