Once again, in keeping with your usual MO, you choose to ignore evidence. The 2012 and 2014 teams failed because of injury and (in 2014) because of an excessive reliance on young talent not ready to produce. In both cases, management recognized the team's shortcomings early enough to bail early and plan for the future. The conditions that the Sox set in place for their success in 2013 are quite similar to those that they've set in place for 2014.
On July 21, 2014, the Sox were only five games under .500, 7.5 games back, but recognized that they were going nowhere and bailed on the season in favor of 2015. Two years earlier, on July 19, 2012, they were three games over .500, but 9.5 back. Here, they bailed on the season in favor of building a championship for 2013. The rest of the season, like 2014, was a disaster, but it set in motion the conditions for a World Championship in 2014.
Now, if you go back and look at the 2013 stats that you've obviously totally ignored, you will find that they had a total of one player who played substantially over his career norms: Koji Uehara. A second, Clay Buchholz, was brilliant, but lost half the season to injury and won only 12 games for a team that won the division by 5.5 games.
The Sox right now are short two starting pitchers and a third baseman from having a contending team for 2015. They also have in excess of $50 million to spend for next season. Yankee fans can only wish that Brian Cashman had the foresight to can 2014 in favor of 2015, though he was and is hamstrung by about $100 million in bad contracts (for 2015 alone) that he cannot get rid of.