I recently flew with Vueling from Heathrow to Bilbao. I am slf but a licensed aircraft engineer of 35 years and now a very frequent flyer especially on 320s - BA, easyjet, Aer Lingus, Air France etc, so used to normal ops with all these guys.
The most pertinent part of the post is "aircraft engineer". Have you ever reacted with a
when a pilot complained about something technical ie in your domain as an aircraft engineer?