2. How was LeCun harmed? As far as I'm concerned, he accepted the feedback. And just so we're clear on what happened then - Gebru was only one of many with qualifications who were aggressively critical because of his abdication of research responsibilities. I don't know why you're so focused on Gebru in particular.
3. Yes, if this was about performance, her direct manager who oversees 300 people would know.
4. So yes, glad to see we agree higher ups, who she likely has little to no interaction with to supposedly be exhausted of her behaviors, stepped in to get rid of her.