"why did nobody, ( 3 of them) recognize the stall "
As I have pointed out before. At the time simulators portrayed the A330 stall as conventional. i.e In alternate law pulling back stick stalled the simulator first buffet & then nose drop. Also simulators flew in alternate law the same at 38000 ft as 12000 ft. This is not the case in reality. IMHO the aircraft did not respond the way they may have been trained.