Maybe you’ve never worked at a company like this. Did you not see the note about his perf review, which had nothing to do with his performance (the actual outcome) but instead had random negative feedback? Like not involving coworkers enough? What if your “confession” indicated that you have a hard time opening up and involving others? Couching your feedback in a personal insecurity makes it far less likely it will be challenged since the person already has a complex about it.