What makes Linux appealing to me is the extent of customizability, but I didn’t find many answers when looking up with desktop environment is them most customizable. Some say KDE is most customizable than say, Gnome, but doesn’t Gnome support CSS customization while KDE doesn’t?
EndeavourOS’s default XFCE theme looks very modern to me ! I mean sure it looks more like old school windows era, but that doesn’t bother me at all. I like simplicity and customizability.
What’s cool about XFCE, its only about config files to customize your whole DE.