A good DEX with lower transaction costs is doable but not on Ethereum.
Serum is currently using Solana's technology and they created the DEX, which has many features on it, this project is clear and reputable.
The future will have many new DEXs on different blockchains with newer technology and more savings.
I don't believe in DEX projects with anonymous teams because the risk of scams is very high. Some guy recently lost $ 140,000 UNI on a new DEX by locking his money into the liquidity pool.