If this was a little hobbiest distro, I'd agree with you, but this is one of the most popular distros out there. There is a certain expectation of competency and quality.

I would argue that shipping the master branch of a bootloader isn't competent when there are stable releases available, and not addressing the issue when literally thousands of users are having the problem isn't very respectful of your userbase.

FWIW, I did eventually fix it, but the endeavour os folks were much more understanding and helpful with the issue. The arrogance I saw on r/arch was insane and offputting.