We’re so used to interacting with corporate “customer service representatives” that actual good service feels illicit.

I don’t want to see a dissappointed customer, but with a little humility and generosity they can be some of your best advertising 🙂

For ad blocking it, doesn’t matter at all.

DNS over HTTPS is done to prevent your ISP/anyone listening to your external network traffic from gathering data about your web traffic that you’d like to keep private. It’s more of a privacy thing than anything else.

If you want to ensure that your DNS requests are not altered by potential adversaries you could also configure DNSSEC, but that’s an additional step that usually isn’t needed for most people (unless you’re extremely rich, politically exposed or in a similar risk category)

Sorry for responding to a bit of an old post, but if you’re using Linux you can use cloudflared to handle DNS over HTTPS and then point your Adguard at the local ‘DNS Server’ that cloudflared creates.

Instructions are here: https://docs.pi-hole.net/guides/dns/cloudflared/

Only the ‘Configuring pi-hole’ section is pi-hole specific. All you’d need to do is to determine how to set AdGuard to connect to 127.0.0.1 port 5053 instead of whatever DNS server it’s currently using.