i do not believe that ledger sent you a leaked device. even if they did ,which is extremely unlikely, you made the mistake of not resetting and verifying on the app. you have to add an application on ledger for every coin. it could have been tampered with on the way to you. there are many videos showing how to verify if the packaging was tempered with.
you are right, i know nothing about eterium other than that it is a centralized scam.
but i know a lot about ledger, trezor and many other self made hardware wallets, building them, programming them and using them