Is there any way to destroy the bitcoin? Not to hack or fake it but completely destroy the system.
Yes. It should be pretty easy for someone like you. All you only need to do is just to locate the switch that on the blockchain network then switch it off and you get your wish without any hacking of faking anything.
I think the blockchain ON/OFF switch is located at blockchain.info's headquarters. They are the company that maintains the authoritative blockchain on their centralized servers. They should be pretty easy to locate. Just check their domain registration for their address.