It didn't seem that historically accurate, it's believed the Romans only slightly scourged those who were going to be crucified so they would still remain capable of carrying their cross...
As of which, it's been proven that it's impossible for any man of average build to walk as far as they were required to without collapsing if carrying the full cross; therefore it's believed they only were required to carry part of it and it was assembled on the site. I doubt they would have treated Jesus with any other treatment given they viewed him as just another man defying the law.
Of course, there’s also the debate of what the cross was actually shaped like… but that’s quasi-irrelevant
If someome believes in Christ; it's an emotional movie. If someone doesn't and are not a sadist, I doubt they would even bother to watch a minute. If the individual is a sadist... well, they shouldn't even watch it but I know several who gained happiness from it.