If you search for the main idea of the piece (an actual quote that states the main idea) you only find it finally in the last paragraph; “The fatal misconception behind brainstorming is that there is a particular script we should all follow in group interactions.” If you drop the over the top word ‘fatal’, you have the author’s main idea; that there is no particular script to follow in group interactions. The author actually does support that idea with evidence, evidence which you may argue with, but with enough evidence that he actually does have a point (however flawed and assumption-filled).
The infuriating thing is that I think there might be. We could write articles acknowledging that certain conversations can exacerbate crippling guilt and self-loathing, particularly for people with anxiety, depression, or other mental illnesses that make them fixate on their own perceived worthlessness. We could really, truly, not-just-lip-service integrate concern for those people into our activism. We could acknowledge how common this experience is and have resources to help people. We could stop misidentifying anguish as entitlement, and stop acting like anguish that does have entitlement at its root is deserved or desirable or hilarious.