Which GPU are you using?
I spent a good 10-20 hours just trying to get it to boot to a largely error-free experience with SDDM and KDE. I set out to daily drive Hyprland and what a shit show that turned out for me on Nvidia GPU and Alder Lake CPU.
The basic gist is you have add nvidia, nvidia_uvm, nvidia_modeset and nvidia_drm to your mikinitcpio conf, regenerate your initramfs, then adding kernel boot parameters nvidia-drm.modeset=1 and i915.modeset=0 before it can even boot to a usable state. Apparently since 6.0, the igpu grabs the display and refuses to give it back. I don’t know how the fuck any “normal” user is going to figure out how to do all of that. Then I spent another evening trying to figure out how to get VAAPI working properly. There’s lots of outdated info in the wiki and not much else to go on, but I figured it out eventually.
BUT, having said this, I do recognise when you go Arch, you’re asking for all of these jank. And, for science, I wiped and tried out endeavouros, and it was surprisingly painless, mostly just worked out of the box (I didn’t check if it was nouveau but it might have been, I also didn’t check if VAAPI was working).
In the end after what seems like 400 wipes and reinstalls, I got it working just right. But it wasn’t painless and it certainly isn’t meant for the faint hearted.
Yes I know the fault largely lies with Nvidia and their shitty proprietary drivers, and so on. But the exact same machine worked just fine in W11, without a single jank or terminal command (not 100% true because I did run OOBE\BYPASSNRO to skip the online junk).
Moral of the lesson: go vanilla Arch if you are comfortable with figuring out shit on your own. Otherwise, stay the hell away and pick a starter distro like Fedora or Pop!_OS that is mostly jank-free.
obligatory I use Arch btw.