fa2fi - There was no expectation that the trolley will never have a bit of bacon on it. The expectation set by Easyjet was that the airline would provide some kosher food, rather than providing only non-kosher food. In the same way, on a route to Amman, if Easyjet promise soft drinks will be available but actually sell only beer + wine, you will not get a positive reaction.
I totally agree with you however that this is a case of the Telegraph completely overhyping this as a scam. It was just a screw up on the part of someone at Easyjet who's presumably been told off.