While watching this there were a few times where I thought “Hey, this actually looks really good”, then I realised that was the RTX off shot. The RTX on shots just didn’t do it for me as much as they did for games like Quake 2.
I think that HL2 just already had great baked lighting that adding ray tracing doesn’t make it feel much different.
If you boot to an Ubuntu iso, you can use arch-chroot to set up everything you need correctly. Done this many times when I borked my Arch boot process
https://manpages.ubuntu.com/manpages/focal/man8/arch-chroot.8.html