Some CEX have p2p, but they demand KYC. There are a rich environment of CEXs with multiple payment methods and the most liquid markets, but it is all about decentralization. P2p is decentralized, analougue to DEX. Thats is the way in my opinion.
Liquidity and trading pairs are the major drawbacks of a decentralized P2P crypto exchange platform. However, you never provide information about the particular crypto you want to exchange so we can know maybe it on fixedfloat, LocalMonero, and Crypton Exchange which are platforms I have used and like their service.