Huge plane guy here, the plane clearly stalled (not enough air travelling over the wings to produce lift) and didn't have enough altitude to recover.
This could be for a number of reasons, either there was a problem with the controls like the elevator being stuck or the engines not having enough thrust during takeoff. Hell the pilot could have been high as shit and totally fucked up. Either way, the pilot was either landing or taking off (you can see the landing gear down just before impact).