Could it be that the manjaro repos have older versions of the HIP runtimes then what blender 4.0 is built for? Just a thought. Either way I would report it to the blender devs so they can fix it if it’s a bug
Why don’t you get a shark vacuum cleaner. Honesty those make vacuuming kinda fun( it even has headlights!). You can stick some headphones on, listen to some music you like, and you even get some exercise! And you can still vacuum when the WiFi goes out!
Now if you’re disabled or something I understand the need for a robot, but otherwise you could save a ton of money, get exercise, and have zero privacy concerns.
It looks like a cool distro if you want/need a highly configurable package manager that makes your system easily reproducible.
But if you’re just looking to learn more about Linux and learn more about how your system is set up then your average distro you might just want to go with Arch, Void, or Gentoo.