If infinite customization is what you’re after you shouldn’t use a DE. A WM like i3 och hyprland is much better suited for that

Hyprland too

EndeavorOS is arch with an easy installer and some default apps.

Manjaro is a worse, split repo that doesn’t work at all together with the architecture they are building around. They actively encourage use of AUR packages whilst their own repo packages are sometimes out of date and create issues with AUR packages since they don’t delay updates from there.

There are also tonnes of other issues with Manjaro, overall, don’t use it.