I doubt training a major factor here.
the problem is the low level of experience brought about by the treatment Airlink pilots get from management w.r.t. Salaries, FDP's, overall working conditions which makes Airlink a mere stepping stone to bigger and beter aircraft and working conditions, this rubs of with low moral, fatigue and general lowering of flight safety standards due to the overworked and morbid flight crew attitude, and this in turn can lead to pushing the safety envelope either intentionally or unintentionally with results as we see...3 accidents/incidents in 3 months.