Earlier quoted context omitted.
> Centralization of the entire internet behind a single entity is a _bad_ thing They do the opposite. They enable small website owners to survive on the internet without having to use vertically integrated services like cloud offerings.
I'm not sure you fully understand the problem. If I hit the big red button and just shut Cloudflare off, millions of websites drop off the Internet. It is a massive single point of failure, and as you point out, a vertically integrated service (DNS, DDoS protection, WAF, proxying, etc).
As for the millions of websites going offline. Surely, Cloudflare has tons of customers. It's an internet scale company. If they act sloppy and have tons of downtime a competitor might take over. If it's hard to architect a DDoS protection service in a robust way then that's just the world we live in. But I think you should appreciate that Cloudflare sells DDoS protection (their core product atm) without selling you a big package like http serving or root servers.