Why you do not search in Google about all decentralized exchanges.I think there you will find all exchange list with ranking and proper details.
I am providing a website link here where you will find almost 40 decentralized exchanges with proper details and ranking
https://defiprime.com/exchangesHe doesn't google because he's creating a debate, the user in the OP opens a discussion, although weak, because the topic has been discussed.
I think, he does have an objective point, wants to discuss the topic Dex-CEx, he seeks personal experiences.
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I would say that in practical reality, for bitoin it is very easy to get Exchange Dex, but in the daily utility of an Exchange we sometimes use a centralized Exchange for various reasons, e.g. there is the cryptocurrency that could (want) trade, or the Exchange offer deposits with the currency and the mechanism you are looking for, debit / credit cards, swift, e-wallet, etc.
If you are going to trade bitcoin there is always a Dex available, bitcoin is to have control of your assets.