It's a series of bad takes strung together into this flimsy idea that a [relatively tiny] service provider has the power to push anything on anyone. That is not to say that a post like this might not be possible, but this series of stub points is so poorly developed, and so full of unsourced nonsense, even defending its presence on HN feels like trying to take the chap shouting at pigeons at the park seriously.
You could level the same arguments against half the hot take blog posts that end up on the HN front page. I fail to see why this particular post raises so much ire that it warrants flagging, save that it's going after a sacred cow.
It's not going after a sacred cow. The idea that Cloudflare is evil for centralizing the internet is commonly seen in HN comments.
This writer does a terrible job of advancing their argument. None of the points are developed or supported. There's no evidence provided, just a litany of bald assertions. It also seems to fundamentally misunderstand details of how CDNs work in its rush to attack Cloudflare for being a CDN.
It's not debatable, it's risable.