Somewhere in and around vref, rotation, lift off, and initial climb, control of pitch wasn't as expected/normal.
Very brief window of time to salvage this upset, if it can be.
Lonewolf_50...
It may very well be that there was no pitch control available to the crew.
Some here are assuming that the airplane was controllable in pitch, and that the nose could be lowered normally by a combination of pitch/thrust. That may not be the case.