flight data does not point to the plane stalling, it was going fast.

And we can see the rate of climb/decent. nothing significant.

It would therefore be impossible for the nose to be very high to invoke the anti-stall system. As this would result in a much higher rate of climb which we do not observe prior to nosediving into valhalla.

Something else happened.

Speed was good, altitude was OK, but the pilots managed to lose total control of the plane in moments.

Pilots have multiple ways to keep a plane in the air with malfunktions. What ever happened was catastrophic and unrecoverable.

The pilot had 8000hrs, he would have many ways to regain control under normal conditions or at the very least initiate a controlled crash at minimal speed.

This is beyond scary.

Boeing has a very big problem.