it SEEMS what they were facing was a pitot problem, absolutely no fault of Airbus, they didnt design the pitot tubes.
What do you mean ” the electronics seems to have become weird”?
Yes, Airbus aircraft are flown with a sidestick, there is still a manual link between this and the aircraft flight surfaces, so ALL electronics and power could be lost and the plane would still be controllable.
Even with the inconsistent speed readings the flight should not have gone down, what to me is the most curious thing is that during 2 different stall alerts the PF commanded nose up, which goes agaisnt everything he would ever have been taught.
And the new B787 is even more reliant on automation than airbus aircraft, although it has a conventional yoke.