It was so ugly. Every time it rained, the concrete became streaked with sludge and gross lines. The few windows weren't glass, they were semi opaque plastic to save money. They put in extra small windows so they could fit in window AC units, but ran out of money, so there was neither AC nor large windows nor even screens. The stairwells all had these "artistic" gaps on the sides, 4 inches of nothing, so many kids threw shit down those and there was no reason for them, they limited the useful width of the stairs.
To top it all off, there was asbestos and lead paint everywhere, we knew we were exposed to toxins but they had no budget to repair it. They actually cut music completely for half of my years because it's less important than the other subjects, I suppose? Inner city public schools in the USA, very budget limited.
Brutalism was, in my aesthetic opinion, one of the downright ugliest movements in art history.