When Windows XP came out, computer magazines wrote articles on how to switch the more modern, colorful UI back to the old, grey, drab, boring UI of Windows 95/98/2000.
I was young at the time and this seemed absurd to me. Why would you willingly use a UI that looks like wearing an old grey tie for a dusty office job in a depressing concrete building?
I was youngish at the time and thought Windows XP looked like clown vomit.
There is a German saying "Grün und blau schmückt die Sau" ~"green and blue grace the pig" - and XP was green and blue and shiny like hard candy.
Some people like brutalist architecture.
I think is so ugly that I'm half tempted to chatgpt fact check this comment. It very well could have been a deliberate conspiracy to lie to the public and say it looks good to make some austerity go down easier.
The older UI was also noticably faster. The new UI looked like a daycare: saturated colors and all thick, rounded borders on everything.