Few things (some spoilers)
There are a few things that made me shake my head, but most of them involve just how nonchalant everyone is, like as if a nudey forced labour camp in Spain would be in any way acceptable. So when the couple gets captured and told the woman has to stay and work, the reaction should be "are you an absolute lunatic? What do you mean we have to stay here? Of course we're not going to" - regardless of whether or not that would have worked, that would have been the logical response. Instead they just kind of accept at, is if to say "well it sucks, but it IS the law"
Also how nonchalant the women are after being kidnapped and forced into prostitution. "Oh, I guess this is my life now. Anyway, I'll be the prostitute this morning, my friend is sick". Classic Franco logic.
Also, what are they even doing in the camp? They appear to be doing nothing other than digging into a mountain. Why not have them work the land properly and grow vegetables to sell, or build something or raise livestock? Why just have them digging aimlessly into dry clay?