With Bitcoin ATM, users still have to provide their phone numbers in order to get codes and print Private key, public key before they buy their bitcoin. Fortunately, disclosing phone numbers is far away from doing a full KYC so Bitcoin ATMs are great alternatives for people who scare about and don't want to do KYCs on exchanges or marketplaces.=
We have some ATMs in Romania that do not require any personal information to buy Bitcoin from (haven't visited them in a while though, so things could've changed). I never gave any kind of personal info when I bought through an ATM before.
People probably fall in to the loopholes of fake DEXes and believe such fake DEXes allow them using services without KYCs. The fact is sometimes they can use those exchanges safely, without KYCs, but sometimes they will be mandatorily required doing KYCs, and there are not real DEXes in crypto. They are all centralized.
Not really. You have Atomic DEX and Bisq which are decentralized (although I think Bisq is more decentralized in comparison with Atomic DEX for now) and ask you for no KYC. There's also the Waves DEX which only requires KYC for fiat transactions, but I don't trust it much to be honest.