Whether an individual building performs its function well or not, its still a central tenet of Brutalism to embed the function in the form.

I appreciate that if everything was Brutalist it would be an overwhelming sight, but I definitely think it has its place.

I'm also not keen on the Hayward personally, but places like Brunel University, the Barbican and the airport in the article have a really nice reduced functionalist style with interesting angles and use of glass.

Edit: Also in terms of popularity of Brutalism, the Barbican is constantly getting praise, and I think has or had architecture tours happening.