The Internet, at least in the US and probably the world, is not a public utility. It's run by a conglomerate of private corporations that have just as much rights as an individual, at least according to US law.

Cloudflare is a CDN just like many ISP's. And ISP's have had the right to control traffic how they like for decades (within reason of course based on a stipulated contract). They do not provide journalistic services, or speech services, or editorial services. They provide infrastructure. So it's not like Facebook or Twitter which are discussion areas.