I agree with article's title that Cloudflare is slow but I don't agree that Cloudflare can't do much about it. For instance, putting efforts to remove bots and malicious actors from using its platform is one thing, Cloudflare can do with more seriousness.

Cloudflare turned out to be a big mistake for us. Read our experience:

https://freesoftware.life/how-to-speed-up-your-wordpress-web...

https://freesoftware.life/how-using-cloudflare-free-plan-des...