Ellen Pao. She fired Victory who was very popular for running AMAs (Ask me anythings) with a lot of high powered people. The popularity of those dropped a bit after that and they were never the same.
Edit: Someone clarified below that Knothing took responsibility for firing Victory but Pao definitely took the heat for firing victory on top of nuking several popular (edgy and outright bad) subs
Edit: Someone clarified below that Knothing took responsibility for firing Victory but Pao definitely took the heat for firing victory on top of nuking several popular (edgy and outright bad) subs