I've heard several years ago that their UI philosophy is to target advanced users. No problem with that specifically (although one could argue that you can target casual and advanced users at the same time without much compromises).
But their implementation of this philosophy seems to be - "don't think whether it's a good idea to put this button here, just make it an option in the settings". Which is clearly wrong.
I think you're in this discussion just trying to spread misery which I don't understand at all. KDE is definitely targeting all users, and their user experience philosophy is "Simple by Default, Powerful When Needed".
The latest KDE iteration has advanced in this regard in leaps and bounds, which is evident also in the favourable reviews it's seen. Just google for "plasma 5.2 review".
Users don't want to design their user interface, it's not their job. This approach is like - here are some musical notes, compose the song that is perfect for you!
