KDE fixed a lot of Wayland bugs over the last months and especially with the upcoming launch of Plasma 6.0, so I’d give it a try again now or in half a year.
Nvidia also constantly fixes the problems with their Wayland support so it’s only getting better. Debian doesn’t have recent enough packages to have a good KDE Wayland experience.
Gnome Wayland doesn’t support features like vrr/adaptive sync or tearing, so it isn’t a good gaming experience. Otherwise it’s great.