That's normally good advice, but this is a small enough niche that trust-in-brand matters a great deal. Right now AdaFruit is looking like the villain here. I think a little more transparency from them is a very good thing if they don't want to suffer massive brand damage.

Definitely avoid ad hominems, and focus purely on facts. Provide what information/evidence you can without violating agreements, but only if it's relevant to the situation and includes as much context as possible.