I know people who use KDE and like it, and I'm sure it's great technically, but I don't understand why KDE chooses to be stuck with a design language which looked dated years ago, while GNOME continues to develop their style. It's not the type of tried and tested design which isn't in fashion but has remaining qualities. The design of KDE is visually displeasing and brings a poor user experience.
This is basically asking for a response that's just the original comment but with "KDE" and "Gnome" switched. I personally find KDE to look very nice and bring a much better and less clunky user experience than Gnome, so it's completely subjective I suppose. I congratulate the KDE contributors on continuing to make a great product even with people saying it sucks all the time.