This is my experience so far:
I have a DELL XPS 15 9520
With windows 11 installed
I shrinked my 2TB NVMe windows to extract 256 GB free space for EndeavourOS (and turned off BitLocker for it)
I had to disable SecureBoot to be able to boot into my bootable USB created with Rufus
I had that bug that it freezes on selecting bootloader screen: Cassini installation bootloader choice issue - #31 by Ardeshir
I had to remove xf86-video-intel and restart lightdm.service
Then I faced this issue: “windowsbootentry”
Then I removed “windowsbootentry” from settings_online.conf
It looks like you are re-using an EFI partition and it is being mounted read-only. Does it possibly have some filesystem errors that are preventing it from being mounted RW? How much free space do you have in that partition?
I just tried installing Endeavouros again, this time in the same page I selected “New” EFI partition, which resulted in creating a 1 GB EFI partition + the rest of the partition dedicated to Endeavouros (255 GB)
I confirmed and pressed install. But as soon as the installation progress started, it exited at 1% and the window closed. (probably crashed)
I don’t know what to report here or where to get logs from.