In hindsight, the Davis contract was atrocious, but resigning Trumbo (with Mancini waiting in the wings) was really the bonehead move IMO.
I think it all boils down to the evaluation of talent. Signing Ubaldo...signing Davis...signing Trumbo...trading Arrieta...trading Hader...trading J.Turner, etc. This is more than a trend/bad luck. The well run teams know when to sell high / buy low and more importantly when to cut their loses. I'm not sure if it's at the executive level, management level, or scouting level, but this team doesn't seem to be very good at evaluating talent.