Seems fine to me. If you click on the result without hitting enter it copies it to your clipboard. Hitting enter sends the result to your register for further calculation or hitting escape clears it. This all seems fairly logical to me.

If you are looking for a distro similar to Arch where you can compile everything from source you can just use Arch. https://wiki.archlinux.org/title/Arch_build_system

Disclaimer: I have never used this feature so don’t know how easy it is to use, but I do use Arch which is how I know it exists. (I use Arch btw)

It’s not using Nvidia optimus technology is it? My old laptop had a GT 550M in an optimus configuration which made using linux tricky for quite a long time. Should be easier now i reckon though.