I have never heard of WattOS but that sounds terrible.
It seems like antiX is a systemd-free Debian flavor.
If you want systemd, why not just use Debian? Or, if you are looking for a nice preconfigured DE/WM, any of a number of Debian/Ubuntu derivatives.
Mint for best out of the box setup, Pop!_OS for tiling, Zorin OS if you’re looking for a funky styling, any of the Ubuntu derivatives for the major DEs: Kubuntu, Xubuntu, etc.