Overall, I enjoyed the essay and agree with the messaging. However, there were a few sentences that threw me off. I personally struggle with self-esteem issues, and I found these words extremely triggering, despite being sandwiched between words of self-affirmation.
> My best wasn't good enough. I'm not good enough.
> I don't mind feeling ugly or low-status or whatever -- I know my place.
> I don't need (or deserve) your sympathy.
It's difficult to tell if this is just rhetoric / sarcasm, or if the writer successfully processed through these initial feelings. Either way, I take these moments seriously because it's not healthy to let these feelings grow.
If you feel like you're struggling, I encourage you to talk to someone -- preferably a therapist, but anyone supportive works like a friend or family.
If you're adamant about not talking to someone, consider reading The Gifts of Imperfection by Brené Brown.
So what would the therapist convince him of? That his work was brilliant irrespective of the outcome? That's just gaslighting. (Not to say that the interview evaluation was fair)
You would hope that it would help him come to an acceptance of himself in such a way that he was less likely to engage in this kind of negative self talk.