“To be fair, this problem is the fault of ASUS rather than Microsoft”
No, to be fair it is the fault of Microsoft and every company who deferred to Microsoft when they pushed the Secure Boot feature onto users in the form they used, which was long ago forecasted to give Microsoft the ability to make competitive operating systems too problematic and burdensome to implement. How many users realize Microsoft Windows 10 embraced Linux features that have been forecast as part of a Microsoft strategy to embrace, extend, and then drop Linux in Microsoft products as part of its anti-competitive grand strategy?
How many do you think know UEFI is an industry standard, documented and agreed to by the industry at large to address security issues like rootkits, and not just some contrivance Microsoft came up with to screw with their users?