DISCLAIMER: Arch Linux is not a beginner friendly distribution, and this is not a recommendation or good practice.
I know how to use pacman -S. I have yet to experience a Discover related issue after months of use.
If you need a GUI software manager, my suggestion is to not use arch
Arch is actually great for beginners, way better than usual alternatives like Ubuntu for example. If you need a GUI software manager, Arch or Arch derivatives are still better than a lot of the rest.
Besides, a lot of people like fancy GUIs, nothing wrong with that. You're right that graphic app stores aren't amazing, but that's shouldn't be the norm then. I will still do everything in CLI, but I will vehemently defend our less technically advanced bretheren's right to click their mouse on the colourful buttons