The best way to bridge/refuel ETH to Mainnet is through zkSync bridge. -> bridge/ withdraw ETH from any L2/CEX to zkSync -> Withdraw ETH from zksync bridge -> pay $ 1~2 auto claim fee on L2(so you don鈥檛 need to manually claim it on Mainnet) -> get your ETH 24hr later
Better than CEX, better than any L2 to Mainnet bridge. (Avg cost $ 10 or more)