The install process just did not work as documented. Arch has some of the best documentation in the industry so I was surprised the boot loader install docs for UEFI were so confusing (to me). The actual UEFI grub install procedure failed multiple times for me so I gave up.
I have the other parts of the Arch install practically memorized so they were not the problem.
It's not a big deal, I stopped using Linux (for other reasons) last year and have switched entirely to FreeBSD. Arch was always my favorite distro though - at least I use Black Arch in a VM on my FreeBSD host