It might not be Cloudflare's fault, but it is their problem. If their customers can't use their products sporadically, it doesn't really matter why. Cloudflare taking a principled approach hurts their users in the short term, so they have to make a business trade-off between pragmatism and principle. Currently they're choosing principle, so it's reasonable to be angry at them for the short term issues that causes.
It might not be Cloudflare's fault, but it is their problem. If their customers can't use their products sporadically, it doesn't really matter why. Cloudflare taking a principled approach hurts their users in the short term, so they have to make a business trade-off between pragmatism and principle. Currently they're choosing principle, so it's reasonable to be angry at them for the short term issues that causes.