I always kind of liked the Guggenheim museum in New York, but back in the 80's they put an addition on. I was discussing its inappropriateness with an artist friend, and he put it very succinctly, by taking out a picture of the new edifice and drawing a flushing handle on the addition.
The Guggenheim has always been an Art vs Architecture joke. They had the money, he had the idea. The building was a work of art. Never no mind that it was totally unsuited to presenting artworks. Frank wanted to do an inverted spiral and he found someone with enough bucks to let him do it and give him complete control, so he took their money. (They actually leveled off several "landings" because the original design had everything on a downwards spiral.)
Thus.... the wing. It's not thought of as part of the original. It was, however, needed if The Guggenheim was to ever be able to show, well, uh.... "art", ya know. At one point, someone on the board of trustees had actually proposed that they sell off all the original collection and commission works that would be "suitable" to their architectural masterpiece.
I'm glad to see that I'm not the first to notice that a number of the buildings are brutalist. I like the style, but latter day brutalism just started sticking bits out that said, "hey, look at me, I'm a hunk of building". The original works were based on marrying form and function and saying that there was nothing wrong with admitting that a building actually did have a purpose, and then threw that purpose out there.
The worst buildings in that list aren't the worst designs. They're the worst impositions of a style on a landscape or environment. Bombs are too good for that piece of crap in Paris. It is just garish and horrible. And the Boston and Scotland eyesores are for similar reasons. WTF are they doing where they are.