With all these, I wonder why DEXs remain as options when they are clearly way much better than centralized exchanges
They are not much better
The sad truth is, it actually remains to be seen if they are overall better at all. The vast majority of so-called decentralized exchanges are in fact as centralized as any other exchange out there, though they may be centralized at a different level. To make such an exchange competitive, with trades as fast as possible, you will have to run a private (read, centralized) blockchain, and how is that different from a regular cryptocurrency exchange in terms of centralization and control over users funds and assets?
Not too many people are too technical about their differences.
IMO, what centralized meant is that you will have to trust a site, input your password and they'll in control of you assets once you deposit it.
What I understand about decentralized is like what ETHER DELTA has been offering before, you input your private key and you are ready to go to trade and it assets listing does not go with the process of a centralized exchange,.. maybe my knowledge is not too deep, and sorry about that.
Well, basically, the difference is that decentralized exchanges do not require the user to submit his/her cryptocurrencies to the platform in order to be able to do trades. On the other hand, centralized exchanges, as stated by the very subject of this thread, is becoming the banks of the cryptocurrency world primary because they have custody over your cryptocurrency assets. That difference itself is crystal clear.
In a centralized exchange, your Bitcoin is not really your Bitcoin because you do not hold them yourself. You do not have 100% control over them. Your Bitcoin is in the hands of the centralized exchanges and those platforms could easily plan an exit scam, or be hacked, or be attacked in some other ways that would bring you into a situation where you don't have any other choice but to say goodbye to your coins.
Last year alone, hundreds of millions of USD are lost due to successful hacks. For the last decade, more hackers got past the security systems of centralized exchanges and they successfully stole coins worth billions of USD. And not just coins, hackers are even stealing personal information out of KYC submissions. And how little of these stolen amounts are actually recovered?