There is simply no parallel in real world history for the barbarism on display here.
Oh goodness no. The Romans were much harder on their prisoners than this and as systematic. What about the triangle slave trade - two or more months on a hell ship? The cruelties of pre-modern China were for decades assumed to be a myth - they weren't. The Vikings weren't systematic, but were quite a bit more cruel. And don't get me started on the Harkonnens.
As strange as it sounds, its not that bad. She seems to have some basic rights, which the folks above did not. She seems to have the right to choose her fate. No one is being out and out violated. She stole, she's in jail. The punishment of being in jail for years seems unduly harsh to our sensibilities, but the choices she has been offered clearly have been simply stolen from the less powerful in the past.