whatever the reason ethereum will not die, eth will still survive in the future. Just because transaction fees are high doesn't mean Ethereum is hopeless. The ethereum community is very strong right now, and ethereum is also creating new ATH.
The problem of fees on Ethereum transactions is not something that cannot be solved, because it can still be solved if the Ethereum network is no longer as busy as it was in the past, and this is not something that should always be looked at because in my opinion Ethereum is a very perfect coin and far from death, unless the apocalypse comes.