teropa, the supposed problem which made this aircraft difficult to control was that the auto trim (AP engaged) continued to trim nose-up to maintain a stable condition. Although the AP was in GS mode, the trim state is a function of airspeed, thus as speed decreased – (pitch control attempts to follow the GS) more nose–up trim would be applied. The trim might not have reached maximum as there is usually a small delay, but the setting appears to have been beyond what would normally be expected during a go around resulting in large (out of trim) control force in the nose-up direction.
This is not to say that the aircraft would be uncontrollable, nor with the added nose-up moment from TOGA thrust; a critical issue is that the force appears to required a two-hand push in an erroneous situation where the thrust levers also require to be held forward due to the failure to disengage AT – retard mode still active due to an erroneous RA1.