I feel like this paradigm should be called “web primitivism” or “web essentialism” rather than “brutalism”. Brutalism is kind of a huge umbrella that embraced technological advances and quite decorative and provocative forms, albeit in a rather monolithic sense. Brutalism in architecture is also often in conflict with humanistic* motives- the structures were often functionally atrocious, which is a big reason why it’s not a thing any more.
I get that they are embracing the “raw” aspect of the brutalist definition, but I think it should also include notions of humanism/functionality, so something like “web essentialism” or “web primitivism” is closer for the mark in my mind. Maybe there’s a better term than those however.
*I mean “humanism” in the sense that the well-being of human users is of paramount concern