The bad thing about brutalism is that while (unfinished)concrete gave architects flexibility in design and allowed themselves to explore new forms, what it actually allowed was cheapness.
The problem with brutalist buildings is not so much the unfinished raw concrete aesthetic or the imposing stature, etc., it's that this new concrete building technique allowed them to build cheaply without much thought to anything else like livability, use of public spaces, connection with surroundings, upgradability, etc.
Even the cookie cutter tile-clad midrises of china are better suited to human habitation than most brutalist estates because these tileclad midrises are weaved perfectly into the fabric of the cities they rise in.