This article was written in the sense of bashing gnome but yet some points seem to be valid. It explains the history of gtk 1 to 4 and the influence of gnome in gtk. I’m not saying gnome is bad here, instead I find this an interesting to read and I’m sharing it.
Clickbait title, no thanks. GTK is alive and doing very well, considering all the major distributions use GNOME or a fork of it.
KDE has major Windows syndrome. No amount of polishing that turd will make me ignore the fundamental user unfriendliness that is nested text drop-downs.