> Actually it's worse than that they used to have a TUI installer but then removed it

Not sure what you're referring to here. Archinstall [1] is relatively recent [2]. I used it a few weeks ago to quickly yeet a machine into Arch for some testing. Worked flawlessly and had the machine from live boot -> Arch install on root media in under 5 minutes.

[1]: https://wiki.archlinux.org/title/Archinstall [2]: https://www.phoronix.com/news/Arch-Linux-Does-Archinstall