Just flew with a training Alpa guy on my last trip. We discussed the 3 resignations we had recently. 2 of the 3 were guys that had been at XYZ regional flying the same airplane for 20 years . He said they have a very hard time with some of them , teaching the old dog new tricks. , they don’t get the material well in some cases. Said the younger ones asorb our training better , meaning ones who had a recent type rating etc.
Other guy was a military retiree and had a rough time in training.
All 3 resigned