The frustration surrounding the failures of the San Francisco Giants doesn't just extend to their loyal fan base. It's spreading throughout the franchise, from the clubhouse to the front office. The mixed emotions of tightness in the stomach and wall-punching aggravation have permeated the entire organization and affected everyone... especially general manager Zack Minasian. The 41-year-old personal executive is part of a young, new wave of leadership that includes team president Buster Posey and first-year manager Tony Vitello. Heading into the year, they were viewed as the triumvirate that would rebuild the Giants into true, NL West contenders. Unfortunately, it hasn't worked out that way at all. While it's far too early to call this trip a failed experiment, this season has still been hard to swallow. The Golden Gate Nine has posted a 14-23 record, they sit in last place, and they just played a three-series stretch where they lost eight of nine games.…