That's not correct. He decided that the aircraft was out of control because his primary displays went out at low altitude - the manual says eject if out of control below 6000 ft. But in fact the plane was still flying and responding to controls just fine.
A big factor in this seems to be his overall lack of experience in the F-35 and not flying enough hours to really stay proficient. Highly recommend this analysis by two former naval aviators: https://www.youtube.com/live/g8PBA7k6vP8?si=o2DDBX1XqmM_x1gR