To be fair, I would see why. Arch isn't that hard to install anymore so some people see Arch-based distros that are just Arch with GUI installer as useless. I use EndeavourOS just because GUI installer is more convinient to me.
Endeavour is objectively better than plain Arch, this list is incredibly subjective.
Edit, according to the reply chain below:
My point applies when the desired result of an install is a day-to-day general-purpose OS on a modern (201X+) system. Where the savings of plain Arch versus Endeavour aren't noticeable.
Have you actually tried Manjaro or do you just listen to what other people say about it? I find it has no issues and have been daily driving it for like 3 years now. Just because something has negative hype doesn't mean it's as terrible as people say.
This website has a good summary of the problems with manjaro https://manjarno.pages.dev/ . I've used it too and it's usable from a user perspective, but it has so many underlying issues
I'm fully aware of the issues, but they've never impacted me personally and I'm not much of a distrohopper. If it ever borks my PC I'll probably switch.