Not all projects that called themselves a DEX are the same.  Saturn.Network for example is a true DEX, don't Trust - Verify..
"Saturn Network is decentralized exchange for trading Ethereum & Ethereum Classic tokens. Saturn Network is censorship free featuring automated token self-listing and wallet to wallet trading with no deposits or withdrawals required. All paid trading fees are reimbursed with SATURN tokens, and all collected trading fees are shared among SATURN token holders."
1. NO KYC
2. All on change orderbooks
3. Projects are free to self list