As this is related to CDN, I am gonna leave it here.
The irony is one.one.one.one is marketed as getaway to faster internet, while making CDNs that use GeoDNS slower.
All it takes is a bad route to a far away cloudflare POP to make your internet really slower. Case in point. [1]
I really don't find why no EDNS is considered private, as it only sends the IP subnet.[2] And on IPv6 the IP is far more protected.
If you care that much about privacy, you should be using a VPN.