It is not a staff training issue.
Have schools been abolished for god sake.
I remember one time coming to Krakow.
The girl at the check in desk told me she was obliged to hand me a notice to inform me that all flights over France were subject to big delays because of an ATC strike.
I expressed great concern and asked why the hell flights to Krakow were going over France. She said oh! where is Krakow?