I find it hard to believe that if everything had been a strict text book launch (applying EASA criteria) then you would end up with the unstick point so close to the end of the runway.
Something clearly went wrong either with the timing & Vr / rate of rotation /
thrust used or a combination of these, and other factors.
It simply cannot be right.......
I entirely concur with RAT5.......... he uses "feel".......my choice of word is "empathy".......
We need the likes of the late Sandy Thomson to teach performance to these junior birdmen. I sure they are out there , not just to teach to pass the exam, but to impart an understanding of what the hell is really going on.