Poor airmanship, whatever. A stop would have been ok at FRA, Easily seen from the video clip of the short run before "rotation". Miscalculation of speeds likely, but whatever the cause an abort was the safe way to operate. What sort of flight safety culture does RAM have that would have allowed that type of manoeuvre I wonder?
(Perhaps the sort that claims it was nothing much, and just down to windshear from a decelerating adjacent aircraft on the ground
)