Most cryptocurrency exchanges have poor customer service and some even don't answer any inquiries and complaints, so what I want to change on exchanges is they should improve their support by hiring more employees that can provide good customer service experience to all of their users. Another thing is the security, we all know that exchanges are prone from hacking and we've seen a lot of exchanges got hacked and lost millions of dollars and the one that suffers are the customers, not getting any refund which is not their fault, so enhancing their system security is a must. And lastly, all exchanges should be regulated by government because this is the only way that people will have confidence that those platforms are safe.