If your issue is more generally with a single provider becoming a global MITM for 10% of the internet, then that's a more understandable argument, albeit a meaninglessly existential one.
But, importantly, Cloudflare is also very hostile to Tor. A number of people in the world rely on it for their security and safety.
Some sites are still annoying to browse with Tor, but it's only those that opted into the strictest security settings with their Cloudflare plan. In my experience, the default Cloudflare behavior is not any more unfriendly to Tor than it is to any VPN (which is not too unfriendly, for the most part).
I do agree with you that the global MITM is a huge problem for privacy and access to information. I'm just pointing out that Cloudflare has made some good-faith effort to reduce the friction encountered by Tor users. If I had to choose an operator of such a global MITM, Cloudflare might be the least bad choice.
What they did is too little and, especially, too late. They could have very easily disabled the blocking and yet they are still doing it.
Besides, you claim that it's done in good faith without backing that claim with evidence.
> If I had to choose an operator of such a global MITM, Cloudflare might be the least bad choice.
"could be worse" does not make something acceptable.