From the BBC:
“There was nothing more the pilots could have done.
As alarms sounded in their cockpit, the captain and first officer struggled to regain control of their stricken aircraft.
They were far too close to the ground, and needed to gain altitude. Yet when Capt Yared Getachew tried to guide the nose of the Boeing 737 upwards, an electronic system forced it down again.
Simply pulling back on his control column wasn’t enough. So he used a thumb switch as well, to adjust the aerodynamic balance of the plane, and encourage it to climb. But a few seconds later, those adjustments were automatically reversed.”
Read the full article.