"Witnesses of abuse during a forced-return flight to Afghanistan last year preferred telling national authorities rather than informing the EU's border agency, Frontex."
See: EU agency kept in dark on forced flight abuse (euobserver, link):
“The returns, on a flight from Munich to the war-torn country on 14 August 2018, had been coordinated by the EU agency, but were marked by reports of severe violations inflicted by German escort officers on a terrified Afghan man.”