Is Quad9 a good DNS provider?

In relation to privacy, I remember reading that Quad9 is a good DNS provider and that Cloudflare although in theory is the fastest DNS provider has basically alone the majority of the DNS market, which is obviously a bad idea.

I also remember that recently Quad9 was fighting in court a case where a government wanted to block certain IP pirate pages but blaming Quad9 for "facilitating" them.

I know that both Quad9 and Cloudflare are recommended on PrivacyGuides but I wanted to read some opinions on that.