I just won’t believe that the PF was not rotating because the FD didn’t move upwards.
The PF is looking out the window, initiating the rotation at “rotate” call from the PM. No-one should focus on the FD at that particular moment.
There has to be something else to it! Must be! Whether the AP was engaged or some trim/flight control issues etc. It simply can’t be just the FD’s.
Therefore don’t judge the crew to easily before the initial report comes out.