> I do not need to put effort into destroying those things [proof-of-stake blockchains]
You originally said you want to destroy proof-of-work blockchains, and were looking for advice on how to do that with ETH. It's already being destroyed on ETH by proof-of-stake. You asked for advice, that's the advice. You don't need to do anything except wait.
Now you are saying you don't need to put effort into destroying proof-of-stake. Why is that relevant here? It suggests to me your goal is different from what you originally stated. Are you looking to see the destruction of more than just proof-of-work? The destruction of BTC and ETH, even if they switch away to another consensus mechanism?