I remember a Boeing engineer relative of my wife telling me, YEARS AGO, he would never fly on any African airline. He said the pilots who came to Seattle from Africa to train on Boeing aircraft did not like to study the manuals or immerse themselves in the classroom training. They just wanted to jump aboard and get their hands on the controls and get their new Boeing plane up into the air.
He also said their maintenance operations were a disgrace. If cabin pressurization failed, they would often not immediately ground the aircraft until it was repaired. They would just keep flying the plane and keep it below 10,000 feet.
They were DEI before it was cool.