There are many out there, but most of them has 0 to no volume at all.
Are there any proper DEXs with big volume? Although I haven't checked, I assume none of them match a big centralized exchange's volume yet. Everyone would switch to the DEX if there were any with high volume.
Hopefully in another year or two some genuine DEXs might take over from centralized exchanges.
I would agree that lack of volume is a major problem with DEXes out there. It is hard to get a person selling and a person buying to use the same platform. NebliDex was created to make the process of onboarding a lot easier.