I have recently been using a decentralized exchange that offers a very smooth operating experience, developed by the $PERP team, called Nekodex.
✅ No Gas fees
✅ No need for mnemonic phrases, no need to install a wallet
✅ Supports cross-chain trading
✅ Customer support is also very responsive
If you like DeFi but dislike complicated processes, I recommend you try Nekodex; it's really easy to use.
(I am a Nekodex user #92754607, feel free to ask me if you have any questions!)