I was reading through the complete issue thread and I have to say I probably would side with the wolfSSL maintainers in part but they could have handled it in a nicer way.

"Anthu" only responded with this after "feld" asked why the issue was closed by them, and only then the response you mentioned was written.

"Anthu" could have simply asked before closing the issue and the reporter would have been fine. Like, say "So, this issue meanwhile evolved into RFC compliance and got a bit off track in my opinion. Can you please open up a separate issue for this so we can get this fixed in a more focused manner? That would be very helpful for our workflow. If not, I would open up an issue and reference this one if that's okay with you."

My point is that feld felt a little ignored in their problem, and the support role could have handled it a little nicer. I get that maintainer time is limited, but I would probably recommend an issue template for these matters where there's checkboxes in them like "keep it short, keep it reproducible" and maybe a separate issue template and tag for RFC matters.

On the other hand, "feld"'s blog post reaction was also quite trigger happy and in part in bad faith. They could've communicated the same things in a "non rage mode" after things have calmed down a bit.