I don't understand the #blind anger toward# QRCodes.
I have to use them a lot at work and the only time I have difficulty is when there's more than one at a time and I am wanting to scan a specific one within the same screen.
Whenever I've had to scan one in public (such as at a restaurant or other venue) there's only been one and it's worked reliably and accurately every time, be that for tracking attendance during the pandemic, accessing a menu, paying a bill, reading a concert programme or so forth.
I've had to use them in place of OTP codes, to link apps (like WhatsApp etc), and never had an issue.
What am I missing, please?