Even within just the CDN category, Cloudflare does a lot with its basic CDN offering (bot blocking, transformations, dynamic caching, etc.) that other vendors may charge as separate options.
That's not to say I don't believe you, I just wanted to make sure it's apples to apples.
Cloudflare's pricing model only really makes sense, IMO, if you're either a small/med business (which makes it an incredible deal) or if you're working cloud-native using their edge functions (workers, pages, etc.). If you're primarily using them to shield and proxy a LAMP monolith or similar for a large number of users, yeah, I can see how that would get expensive really quickly. There are other vendors who specialize only in that, being a dumb CDN. Cloudflare's value is that they enable completely new architectures based on their network topology... you can't easily do something like that on Fastly, for example.