Does the author of this post not see the irony of posting this content on Github?
My counter argument is that "centralization" in a technical sense isn't about what company owns things but how services are operated. Cloudflare is very decentralized.
Furthermore, I've seen regional outages caused by things like anchors dropped by ships in the wrong place, a shark eating a cable. Regional power outages caused by squirrels,etc... outages happen.
If everyone ran their own server from their own home, AT&T or Level3 could have an outage and still take out similar swathes of the internet.
With CDNs like cloudflare, if Level3 had an outage, your website won't be down because your home or VPS host's upstream transit happens to be Level3 (or whatever they call themselves these days) because your content (at least static) is cached globally.
The only real reasonable alternative is something like ipfs, web3 and similar talk.
Cloudflare has always called itself a content transport provider, think of it as such. But also, Cloudflare is just one player, there are several very big players. Every big cloud provider has a competing product, not to mention companies like Akamai.
People are rage posting about cloudflare, especially because it has made CDNs accessible to everyone. You can easily setup a free cloudflare account and be on your merry way. This isn't something you should be angry about. You're free to pay for any number of other cdns, many do.
If you don't like how Cloudflare has so much market share, then come up with a similarly competitive alternative and profit. Just this HN thread alone is enough for me to think there is a market for more players. Or, just spread the word about the competition that exists today. Use frontdoor, cloudfront, netlify, flycdn, akamai,etc... It's hardly a monopoly.