If you really want to understand what the current DoH/DoT drama is about just watch this 42 min presentation by Sara Dickinson https://ripe77.ripe.net/archives/video/333/
"In the EU where ISPs are highly regulated by GDPR, your regular ISP is probably better choice from privacy perspective than any cloud-based DNS resolver"
Then follow to https://dnsprivacy.org/wiki/ for even more details