Can you recommend some DEX exchanges?
If you mean localcoinswap, agoradesk, hodlhodl, they are useless and full of scammers.
Bisq I cannot install, so havnt tried it.
The only true DEX is Bisq, the other are just no KYC P2P, you can find the other alternative on kycnot.me
I ever had experience with Agoradesk, trade for multiple times and all went smoothly, so I don't know why you can say it's full of scammers. Probably you're looking for the best rate or they gives too good to be true offers, definitely it's full of scammers.
What's the reason you can't install Bisq? if it's because of firewall or ads block, you need to turn it off. Here's the tutorial
https://docs.bisq.network/getting-started.html