All exchanges charges different fees, there is trading fees and there is withdrawal fees as well, where trading fees can be low, withdraw fee can vary and the blockchain network your token or coin is based on can also contribute to the high fees, that is, for instance withdrawing USDT through Tron blockchain is free or in some cases comes with a very little fee, while withdrawing same USDT through Ethereum blockchain comes with high fees and even higher fee through Omini. Also, the reason why exchanges charges for various fees is to generate funds with which they can use to run the exchange, therefore it can't be avoided and I don't think there is any exchange you can trade and withdraw for free at the same time. Lastly, I think Cryptopia is the exchange that was hacked a long time ago. You can also check Binance, maybe the fee will be friendly depending on the token you are withdrawing and the blockchain.