There was never anything particularly functional or honest about brutalist architecture. A Mies van der Rohe skyscraper is functional and honest: not much more than the structural steel necessary to keep the thing upright and the glass windows necessary to let in light for the humans inside.
Compare with monstrosities like the old Prentice hospital in Chicago: https://en.wikipedia.org/wiki/Prentice_Women%27s_Hospital_Bu.... Nothing functional about the tiny windows, or weirdly-shaped circular interior spaces, or wrapping the whole thing in a material (concrete) that doesn't hold up well to a snowy climate. Just architectural wankery.
Compare with monstrosities like the old Prentice hospital in Chicago: https://en.wikipedia.org/wiki/Prentice_Women%27s_Hospital_Bu.... Nothing functional about the tiny windows, or weirdly-shaped circular interior spaces, or wrapping the whole thing in a material (concrete) that doesn't hold up well to a snowy climate. Just architectural wankery.