I had this exact same reaction. Agreeing with the substance of the critique of approach etc but not at all its tone nor of the underlying elitism that lays there.

This is not how professionals behave in a profession.

Decorum actually matters.

Anthropic is doing bad stuff. They clearly have a broken internal engineering culture. Hence I don't use their products. But I expect to see this laid out in a structured argumentation that doesn't go after people and their personalities.