If you look at every job search decision, action, and result as a measure of your worth, you are setting yourself up for massive failure. In this article a world renowned poker player talks about evaluating decisions based on the information you had at the time you made the decision.
There may be absolutely nothing you can do to win a job you are perfectly qualified for. If one of the other candidates is married to the boss’s daughter, you lose.
In survival, you control what you can control, and let God take care of the rest. In job hunting, interviews, negotiations, and job performance, you control what you can control and let go of the rest. You can’t win every hand.
This is a great article on poker and business.