I don't like KDE because I like my UI components to have padding and not look like this: https://news-cdn.softpedia.com/images/news2/kde-plasma-5-16-...

My argument is that you can choose any desktop environment you want with the most well designed window decorations, but as long as you have most packages built on GTK+ or Qt by people that aren't UI/UX experts, your system is going to be ugly.