You can be angry - but that doesn't help anyone. They fucked up, yes, they admitted it and they provided plans on how to address that.
I don't think they do these things on purpose. Of course given their good market penetration they end up disrupting a lot of customers - and they should focus on slow rollouts - but I also believe that in a DDOS protection system (or WAF) you don't want or have the luxury to wait for days until your rule is applied.
https://www.csoonline.com/article/3814810/backdoor-in-chines...
Most hospital and healthcare IT teams are extremely under funded, undertrained, overworked, and the software, configurations and platforms are normally not the most resilient things.
I have a friend at one in the North East right now going through a hell of a security breach for multiple months now and I'm flabbergasted no one is dead yet.
When it comes to tech, I get the impression most organizations are not very "healthy" in the durability of systems.
(and also, rolling your own version of WAF is probably not the right answer if you need better uptime. It's exceedingly unlikely a medical devices company will beat CF at this game.)