@Jack.
It's appalling alright and Mueller is ultimately responsible and not those who are not in control of the company. The frustration is probably vented even more so by passengers due to the number of cancellations over the past few days when Ryanair cancelled damn all flights in comparison to Aer Lingus. Questions need to be answered insofar as why so many flights were cancelled in comparison to Ryanair. Both companies had positioning issues due to diversions but Aer Lingus seem to be the ones operating to the bare bone in terms of personnel.