Centralization
"Ethereum isn't decentralised"
"Ethereum’s nodes are centralized. It takes too long to sync them, and there aren’t enough of them"
"You can stop Ethereum apps by stopping AWS"
"Blockchain rolled back/reorganized after DAO hack", "The code wasn't the law"
Scalability
"Ethereum isn’t scalable"
Launch
"Ethereum is 70% premined"
Control
"Vitalik and Ethereum Foundation dictates what happens on Ethereum"
Ether (currency)
"Ether is not valuable"
"You can't verify the circulating supply of ether"
"There is no clear monetary policy"
Smart-contracts
"Smart-contracts have no use"
Ecosystem
"Ethereum is a shitcoin casino"
"We don't need tokens"
Ethereum 2.0
"Ethereum is ending", "Ethereum loses lindy effect"
Proof-of-Stake
"PoS is not secure"
"Rich Get Richer"