It's incredibly edgy, but its edginess is deeply rooted in catholicism and cascading traumas.

Everyone in the setting is fucked up and edgy and takes it to the maximum, in part because its maximalist fiction and partly because the points being made wouldn't work otherwise. It's gay drama in a gilded ossuary.

And for context as to the tone: the Oxford professor who wrote it compared it to the KFC double down. It drips with gratuitousness and then slips an old meme in to break tension.

The series is so heavily acclaimed in part because it has no right being this good. Its too edgy, it plays with fanfic styles and tropes, it casually drops vocabulary most adults won't recognize, some of its most significant themes are references to obscure bits of Catholic theology. And when it all comes together, its a deeply human story about a bunch of people who've been made very unwell by a severely diseased society.