Is your device meeting Windows 11 requirement? You might want to reset your BIOS and flash it to make sure BIOS is not the issue here either.. especially if you sometimes cannot even boot the flash drive to install, that can be a BIOS issue.
I had been running W11 since it came out so I don't think it's an issues wrt that. I think there might be a misunderstanding regarding the usb's. I don't have an issue actually booting the usb (i.e., the purple screen), it's getting to the windows setup screen (i.e., the white screen where you setup a new user and so on) that is up in the air if it works or not. 1 USB was facing problems trying to create the bootable media in the first place using creation media tool