I really dont like this centralization of the internet into a few gigantic companies having every site under their wings. And then something goes wrong and millions of web sites are affected.
It also gives these companies the power to shut down any of their user sites.
On the other hand, handling a ddos attack is hardly possible without them these days.
in case you need more reasons agains cloudflare https://www.devever.net/~hl/cloudflare they are really very harmful to both privacy and security of everyone on the internet i think.