If the info from Capt.Kaos is correct, dragging the tail that much would indicate that the aircraft was held pitch up for rotation for some distance, but it apparently never got airborne. That suggests that maybe the correct VR was never reached for some reason, or perhaps the flaps weren't configured for takeoff (on that runway), or perhaps something else prevented enough lift from being generated to get airborne.
My condolences to the families and friends of those who were lost, what a terrible tragedy.
(fixed typo)