Inglebyboro
It's often the case that the service agent sours the customer's experience with easyJet before they even meet an easyjet member of staff. The only comfort for us is that the same service agent will represent most or all of the other airlines at that airport, including our competitors. So in theory, other airlines should suffer similar complaints.
However, despite the fact that they represent everyone else, they still represent easyjet, and you - as you rightly said - bought your ticket with easyjet not some unknown service agency. Without commenting on your particular case, I would strongly encourage anyone with airport handling issues to email Andy Harrison with their complaint. It's generally the worst part of a customer's experience with the company, and one the crews alone often have to make up for.
JB