This is a very old kernel, even for a snapshot. Has this system not been updated in a long time?
The advised update method is:
garuda-update
This is especially true if your system is in trouble, like this one.
I think this is a good start. I would try installing another kernel while you are in there and see if you can get that to boot. chroot into the install, update:
garuda-update
Install another kernel (LTS is often a nice safe bet):
pacman -S linux-lts linux-lts-headers
Select “advanced” boot options on the grub screen to boot with the LTS kernel.