Can't uninstall Endless neither from OS nor from Bios on Asus Zenbook 14

Can’t uninstall Endless neither from OS nor from Bios on Asus Zenbook 14
I’ve tried and tried but the BIOS doesn’t even see the usb as a start up disk and there is no way to make it seen, unless you know better, as you should.
I bought this laptop to use it with Windows not with Endless, which I hadn’t even heard about before.
Thanks for your help

We are very sorry to hear that Endless OS did not fulfill your needs, unfortunately, the installation of other OS which is not Endless OS is out of our hands

I managed to install Ubuntu, away with that endless garbage