It is hard to adapt Windows habits to Linux for some cases. E.g. you sometimes use Adobe Photocrap for editing photos. Reasonable that ppl want to use what they know, so they will try to use it with WINE and obviously will fail. „Linux sucks, it cant run the properitary shit subscription software, going back to Windows!“ if someone really depends on such software then yes stay the fuck with Windows. For most other tasks there is a solution available. And for the fear of terminal: I bet most users never ever have to see or use it once since there are GUI tools available for such crucial tasks like updating. Mint does a great job in terms of windows like experience for beginners but also is a full fledged GNU/Linux distro. But yeah if you want to change to Linux it is not just the desktop that changes, it is a whole philosophy that opens up a new world if you are curious.
I am an Arch gamer too. Use the zen kernel for slightly better performance. I installed most of the stuff the steamdeck brings. So gamemode, mangohud, protonup qt. I tweaked some settings for better performance. There is that one Tool for Steam Deck that sets some performance tweaks, I forgot the name but should be easy to find.
I gamed on both green and red. Nvidia drivers messed things up very often back then. I built a new gaming rig one year ago and went straight with amdgpu, no matter the question. Never had any issues. Bad thing atm is that GNOME is still working hard on VRR. There is an AUR patch available which is either buggy or outdated atm. Thats why I switched to KDE to use FreeSync. Performance related I think they both good, to me it was more a choice of compability and less hassle.
Not sure if paperless could fit your need https://github.com/paperless-ngx/paperless-ngx#features