I couldn't agree more. The Gnome devs have a very long track record of imposing universally hated UI/UX design on people. I'd wonder why KDE isn't more popular, but I'm pretty sure the main reason is that the Gnome devs also have way better aesthetic taste than the KDE devs. Gnome simply looks much nicer in screenshots. They understand spacing. That and KDE had it's own major UI/UX fuck up with Plasma.
For example, in general, I really like what gnome does. Desktop use is not something that is useful outside starting other apps, so I like its simplicity and the fact that it gets out of the way.
Default apps could use maybe a bit more features, but I generally don't find too much wrong with e.g. files. The only confusing thing for me is which hamburger to click when I want to create a new directory. So instead of guessing, I just right click the file list. One positive example in gnome is when you try to access e.g. smb:// shares in files and try to open a movie from the share... It works with no issues. But, kde with gazillion features does not support that.
(Opinion) KDE is not more popular since it's buggy as hell. At least it was. But not only that, their visuals are a disaster. Believe what you will, but visual consistency and attention to detail is what gnome has. They are not perfect, so there are some issues as OP points out, but they are on a different level from kde. KDE looks like it was frankensteined, while gnome it looks like it was designed. Think just login process and sddm, how many time it blinks?
KDE is proud to enable tinkering, and this is good - there are people that like to do that. Thinking back, this was when I was teenager. Now that I'm older, I want things well thought out, designed well that dont get in my way so I can do my work and not think about desktop. And this is gnome.
What I hate about gnome is JavaScript and python focus for apps. And now, suddenly we need a stupid app for everything.