Criticisms of Ethereum?

Ethereum is subjected to the same critiques as all other cryptocurrency platforms:
cryptocurrencies may or may not be a bursting bubble (again). This argument has been going on since at least 2017, a year when Bitcoin’s value fluctuated between $20,000 and $3,000.
Each of these networks consumes a tremendous amount of energy. Cryptocurrency miners, in particular, devote a significant amount of processing power to validating transactions. The fossil fuel energy drain produced by large-scale crypto coin mining activities is one of China’s justifications for cracking down on cryptocurrencies.