Philosophically I think it's terrible that Cloudflare has become a middleman in a huge and important swath of the internet. As a user, it largely makes my life much worse. It limits my browser, my ability to protect myself via VPNs, etc, and I am just browsing normally, not attacking anything. Pragmatically though, as a webmaster/admin/whatever you want to call it nowadays, Cloudflare is basically a necessity. I've started putting things behind it because if I don't, 99%+ of my traffic is bots, and often bots clearly scanning for vulnerabilities (I run mostly zero PHP sites, yet my traffic logs are often filled with requests like /admin.php and /wp-admin.php and all the wordpress things, and constant crawls from clearly not search engines that download everything and use robots.txt as a guide of what to crawl rather than what not to crawl. I haven't been DDoSed yet, but I've had images and PDFs and things downloaded so many times by these things that it costs me money. For some things where I or my family are the only legitimate users, I can just firewall-cmd all IPs except my own, but even then it's maintenance work I don't want to have to do.
I've tried many of the alternatives, and they often fail even on legitimate usecases. I've been blocked more by the alternatives than I have by Cloudflare, especially that one that does a proof of work. It works about 80% of the time, but that 20% is really, really annoying to the point that when I see that scren pop up I just browse away.
It's really a disheartening state we find ourselves in. I don't think my principles/values have been tested more in the real world than the last few years.