Bitterness is a trait ingrained in the culture of professional wrestling. Ego and self-assurance are imperative in order for the so-called independent contractor to reach the top of his profession in a sea of colorful personalities looking to stand out.
The wrestler is a dedicated breed, especially on the national stage, as tireless travel and countless appearances turn a career into a way of life.
With the aforementioned ego and effort that is poured into making making one successful on such an elusive national stage come delusions of grandeur and, yes, eventual bitterness when it all inevitably dries up.
A book can be written on sour grapes in professional wrestling, but for now, we celebrate (and, let's face it, ridicule) those who have opted to harbor ill-will toward former employers who no longer require their services.