Not everybody lives in the US. I trust my ISP. They are cool, and their handling of my data is regulated under the GDPR and other laws. CloudFlare? Not so much.
Rather than putting real effort into this, I'm just going to say that Paul Vixie, the creator of DNS, advocates for using a local resolver (not your ISP's resolver), and DNSSEC. The internet is supposed to be decentralized, not centralized.
Cloudflare, Google, and all of these other centralized dns/ntp services are hazardous to our health.
I'm sure you're very knowledgable, but if Paul gives DNS advice, listen to him.