Just to put some clarity into the argument, no-one here at any time has anyone brought this pilots skills, knowledge, culture or training into question, in fact the exact opposite is true from what I have read about this unfortunate young man.
Everyone appears to be looking for the cause of the accident and that is already known, the cause of the accident is that the aircraft failed to maintain altitude, following an inflight engine shutdown.
Everything else is contributing factors, but not the cause. The investigation will seek to determine what those contributing factors where.