Exchanges are also killin ETH by hiking the fees. They want to make times two of what miners make. They add miners fees to traders who are withdrawing. When you send from your wallet to exchanges the fees is not that much. Take a close look at withdrawal fees and you will understand what am saying here.
If you look at the withdrawal charges in all the exchanges they charge much higher charges in every coin, the only difference is that some of the exchanges gives a much lower fees for their native coin, especially Binance withdrawal for BNB is much lower but the rest of the coins if you are trading for small amounts then you are not going to get the profit you are looking for.