> which "just doesn't work"

Some are more tech savy than others here, but I guess almost anyone can do the following trick successfully:

  step 1. visit https://endeavouros.com/
  step 2. download iso
  step 3. flash iso on medium
  step 4. boot medium, installation window shows
  step 5. you choose KDE, yes: KDE. Do more mouse clicks.
  step 6. system tells you it's done, and offers you to reboot.

Done.