studi,
With respect, read the report.
The protections were not available because the aeroplane had reverted to Alternate Law 2. That means that the pilot is fully responsible for the aeroplane's course except load factor limitations which are still applied.
The A/P and A/TH failed at the moment that the probes froze over and the airspeed readings became unreliable.
The F/O took control.
The F/O made persistent nose-up inputs - not the autopilot.
I reiterate that now the mystery is why he made those inputs.
Any alternative discussion on this thread or any other is quite frankly, irrelevant.