For my money, VRS was not causal here, it was part of the 'ultimate effect'.
Nose-up cyclic progressively robbed the aircraft of airspeed and, at c 300', VRS developed and the aircraft entered what was, at that height, an unrecoverable uncontrolled descent.
VRS and the (probably associated) sudden yaw/hdg changes are an interesting discussion point, no more
Or at least that's my tuppence worth