I agree linux can be very difficult but easy as well if you do not have “exotic” needs. If more people were using linux, especially more non techies, a lot would change but we’ll get there just slowly.
to respond to your points
I initially thiught you meant that you had to use commands in order to tinker with the UI - that’s my bad!
Wifi card, drivers, etc. can be a real pain. That’s neither linux or your fault. It’s just that noone prior to you wanted to use it and that’s why it wasn’t yet supported. Most systems are just plug and play. - compare it to macos, and you’ll find that linux is easy to install on most systems.
Auto mount is done using fstab right. Yoz xna also auto mount from the file explorer of the disk utility, it always depends on the system. There are a lot of different things and it’s not perfect.
Dual booting is in my opinion something for advanced people. I have no idea why anyone would ever suggest it to a newcomer! It’s pain in the ass if you deviate from the standard protocol.
Xou can double click on a shell script (.sh) by chmod +x file.sh or > right click > properties > exe as program