More to the point, look at what people choose to live in. Good modernist and brutalist homes sell quickly and at a significant premium over prevailing market rates.
Modernism got a bad name in many Western countries, because it was used as an architectural and philosophical justification for cheap and shoddy system-built housing to fill the post-war housing gap. That doesn't make rectilinear forms and bare concrete inherently bad; we don't blame vernacular architecture for characterless mock-Tudor estate houses and vulgar McMansions, we blame bad architects, profit-hungry developers and philistine houses.