>>510119388
Plane crashes are the result of a cascade of failures and miscalculations, not one mistake that causes everything.
Just an educated guess in this case, it was probably a mechanical failure or the appearance of one that led to a series of bad decisions due to incompetence or ignorance from inexperience.
Even experienced pilots who are well trained to handle emergencies make mistakes, so inexperienced pilots in a emergency situation is a dangerous thing. Usually these airlines are trying to save money and do shoddy maintenance or lie about the training that their pilots have.
We won't know until the cockpit voice recording becomes public.