I understand, I've felt bitter about interviews before, I'm sure some interviews were unfair. But I also recognize this bitterness is a weakness of mine, unproductive, unattractive.
The way the author indulges in this resentment would make me very cautious about recommending him regardless of technical capability. An employee who has low tolerance for the massive randomness/unfairness in the world probably would get sick of most companies pretty quickly.