I am looking for a word or phrase to describe someone that didn't use their own tool, follow their own policy or use their own product, due to some ironic twist of fate. Almost the antithesis of the phrase "Eats their own dogfood."
For example, a UPS employee that chose to ship something via Fed-Ex because UPS didn't offer overnight shipping at the time. The employee made a logical and justifiable decision, so it is more of an ironic twist than anything intentional or malicious.
I considered hypocrite, but that seems to conflict with the justifiable aspect of the choice. Traitor is way too harsh and implies a malicious intent that isn't in the situation, either.