your device boots, it’s not bricked.
you can’t boot from USB because you haven’t created the install media correctly - do that and you will have no problem. See the docs here. You need to boot a USB regardless if you want to install Linux/Windows, or just go back to ChromeOS
I don’t understand why people come here and say “I read an article somewhere” or “I was following a YT video” but don’t bother to read the docs here first.