2013 was just a fluky random occurrence! It had nothing to do with Napoli playing out of his mind in April while Ortiz was injured. It had nothing to do with Buchholz pitching unbelievably for half a season. It had nothing to do with Koji being absolutely dominant for the whole season. It had nothing to do with Victorino playing the best RF since Dewey. It had nothing to do with a resurgent season from Lackey. It had nothing to do with Lester being the ace of the staff.
The first few games of the WS seemed to expose Farrell as being slow to react. A few of the games really got away from him. At the end of the day though, they won and he earned all the accolades deserving of it.
It was an older team that was unsustainable in the long run. They dumped Lester and Lackey in 2014 and I can't blame Farrell for that year. 2015 was a really young team with no staff ace. I'm not sure I can entirely blame Farrell for that either. To me, 2016 is a bigger indication of how good of a manager Farrell is. If they miss the postseason this year, he should be fired.