Hah. Haha. Hahahahaha.
If you pulled similar samples of UIs from the 90s and from today, I bet you’d find about the same proportion of fucked up designs in both (and that proportion would be shockingly high).
Some applications (especially on Mac OS) tried to stick to Apple’s human interface guidelines, and some of those were successful, but even on the Mac there have always been heaps and heaps of horrible broken user interfaces. And don’t get me started on Windows applications from the 1990s. What a steaming pile...
I think what’s changed today is that (a) with ubiquitous internet and a very easy install process, people end up interacting with more applications (at least to download, play with once or twice, and then forget about),