The pilot cannot get the nose up enough. Nose up determines wing angle of attack and affects lift when above stall speed.
Possible mitigation would include setting flaps, effectively reshaping the wing, but flight speed must be quite low to accomplish flaps successfully.
Regaining manual control of the vertical trim mechanism by disconnecting computer control is a significantly different question and far from aeronautics.
Remember I am a pilot too so I get that. I have never flown a fly-by-wire aircraft and never will. But am I to understand when the pilot pulls the little joy stick thingy back( Make the houses get smaller) the computer can override that? Really? How f---ed up is that? Another question is this: The hydraulics of the horizontal stabilizer can over come full nose down trim, they have the power to be able to do that? Right?