https://gitea.artixlinux.org/packagesA/accountsservice/src/branch/master/repos/extra-x86_64/PKGBUILD
In the PKGBUILD there are these two lines:
51 # Remove systemd dir
52 rm -rf "$pkgdir"/usr/share/dbus-1/system.d
But whit that dir removed AccountsService is misbehaving, Cinnamon doesn't work well, at login there is a black screen and after several seconds (probably a timeout) appears desktop wallpaper.
If you remove this 2 lines from PKGBUILD and recompile the package, the service works perfectly. It seems this directory is a needed DBus service. I think it's not systemd stuff.
Fix has been pushed, be a little while to get to mirrors