Ethereum has over 300,000 validators on the Beacon Chain. 3 mining pools can theoretically execute a 51% attack on POW Ethereum. And 4 mining pools can theoretically implement a 51% attack o Bitcoin. Sounds like the validators might be more decentralized?
Network Validator Count % of Supply Staked
Cardano (ADA) 2,977 69.60% of 33 billion circulating supply
Avalanche (AVAX) 1,199 49.38% of 246 million circulating supply
Ethereum Beacon Chain 309,169 8.2% of 119 million circulating supply
300000 validators, but if one validator or a group of validators control 8.3% they can theoretically execute a 51% attack. with only 8.3% of the network.