[ekianjo]

> There were many problems with the plane, including the physical one of the pitot tubes freezing up

Not many, a single problem actually. Plus, the plane was not crashing after the issue occurred and the autopilot was off. The crew misinterpreted the signals and did not pay attention the Stall alarms repeatedly. The plane was flying fine even without the autopilot, it's a case where the crew actually crashed the plane by themselves.