I’ve been trying to boot EndeavourOS (and for that matter Vanilla Arch) on my system for quite a while now, and it reboots midway through the boot process every time, whether I use the first boot option (https://youtu.be/jKfpDT4i9UU) or nomodeset (https://youtu.be/92QwfKAM_bU). I’m using the latest ISO as of Jul 21, 2022.
I used etcher to flash everything, and tried a couple boot options. iommu=off basically got me the same result, and acpi=off, when in combination with nomodeset, got me past that barrier, but I couldn’t get into any GUI, as Xorg failed to start - (https://youtu.be/ueALth51rpE).
I can get into the latest Debian, so I can collect any Debian logs if that helps.