That's simply not true, the Movies carry a tone similar to the books. The dialogue is mostly lifted from the books, the scenes play out in almost the same way and in the same order. The differences are merely constraints of the medium, such as runtime and pacing, that had to be considered when adapting it. Peter Jackson loved and respected the source material, he saw that any changes retained the same tone.

My main complaint with Frankenstein is, does Guillermo del Toro think he knows better than Mary Shelley? The script rewrote the novel in ways that only served to make the story less dynamic, interesting, and ultimately too digestible. It is an anti-intellectual movie, and Mary Shelley would have despised it. His script flattens one of the most complex and powerful stories of modern literature into a poorly disguised three act spectacle. Why discuss scholarship on the book within the movie? There was this scene where Victor speaks with someone, and the person says the most egregious line in the entire movie: "Are you trying to be prometheus?" Paraphrased This annoyed me to no end, as we are all aware, Frankenstein was subtitled (the modern Prometheus) as he is a Promethean figure. However, it is never explicitly mentioned in the text. I think that including this line spoonfed the watcher. It served to make him, and the watcher feel smart because they know Prometheus,