It is my impression that there is a very long tradition of exaggerating without restraint the sufferings of Jesus, compared with how they are described in the Gospels - especially the Fourth Gospel (being our only eyewitness source).
Suffering is not one-sidedly a matter of the cruelties inflicted-upon Jesus - but also of Jesus's response to the cruelties. And overall, my overwhelming impression through The Passion is of Jesus being stoic - that he suffered from the tortures, but not to the extremity I have so often heard described and seen depicted.
Furthermore, Jesus predicted and willingly accepted his suffering - which is usually regarded as a diminishing factor. (e.g. A woman in childbirth suffers much less than she would if the same (extreme) pains were due to a fatal disease - because she wants the child).
The reason for the long tradition of piling-on-and-on about the sufferings of Jesus, is related to theology, rather than scripture - to the idea that Jesus's primary work was to 'suffer for our sins' - by an account which regards 'sin' as primarily immorality.
Thus, because of this theology but only because of this theology - Jesus must (despite the Gospels) be regarded as having, in some sense, suffered to an indescribably vast degree in order to compensate-for and neutralize the vast (and still growing) scale of human immorality.
Yet this is a narrow and essentially false understanding of what Jesus did - if we are to believe the Fourth Gospel. Jesus needed to die and be resurrected, in order that Men might choose to follow him. But there was no need for Jesus to suffer to an unprecedented extent when he died - and indeed this did not seem to have been the case.
If we are able to perceive that 'sin' meant (mostly) death; and that Jesus 'saving us from our sins' meant (mostly) becoming able to offer us eternal resurrected life - then we can see that the precise manner of Jesus's death was not of primary importance to the success of his mission.
If Men like Caiaphas had been more virtuous and courageous, and made better choices, and Jesus had not been crucified but died in some other and less painful way - this would Not have sabotaged God's plan.
The point of the plan was that Jesus should die in order that he could be resurrected, ascend to Heaven and send the Holy Ghost - but the exact manner of Jesus's death was not crucial.