He has served more time in prison than he would if he had gone to Sweden and been convicted of outright rape.

The sentencing guideline for rape in Sweden is 3-6 years in prison, or at most 4 years (I can't find a minimum) for "negligent rape", and even if convicted for everything he was alleged to have done, Swedish practice in rape cases would mean there's no chance he'd have gotten anywhere close to maximum sentences, and might well have had part of the sentence suspended. In practice, it'd have been surprising if he got more than a year of actual prison.

So without going into whether or not that case was legitimate, or whether or not the handling of it was legitimate, he's suffered more, in far worse conditions, than a Swedish court would have imposed.