If you haven’t heard of EndeavorOS that’s because you are out of the loop. Entirely your issue. It’s a much better alternative to Manjaro essentially.
Also that’s general popularity according to page hits, nothing to do with newbies. Newbies aren’t the majority of Linux users.
Not that there is anything wrong with recommending EndeavorOS to Newbies. The whole point of arch derivatives like that is to make installing arch simpler and easier for the user. Arch is actually a better base distro imo than say Ubuntu for this. It has packages for pretty much anything in the AUR, no digging up PPAs for everything. Likewise it’s all up-to-date too.
I don’t remember MX Linux ever being that popular before, but maybe I am out of the loop.