But they're not free from criticism of their decisions.
Your right to censor and regulate traffic ends exactly where your machines do not reach. Cloudflare own the machines in question, so they decide what stays on and what doesn't. They are the managers of the part of the Internet where their machines reach (Duh), but none else.
It's funny that I have to explain this because it's usually the other way around, some tech giant will usually ban someone for something incredibly arbitrary and nakedly unfair, and the folks crying about Cloudflare's decisions here are usually the first to start cheering and explaining to the rest of us how they're a private company and have the right to do anything they want. Well, Cloudflare is a private company too, folks, and they decided that free speech is awesome and worth it, and you gotta respect their decisions and stop raging impotently about things you can't control.
That's not for you to decide, you're not the manager of the internet.