Yup. getting enslaved the same way the player enslaves other prisoners, and be trained while trying to escape would be a more fun scenario,(and maybe renamed as grudge) the whole nemesis feature is very half baked right now, you can have a high affection nemesis that sells you to slavery and then immediately forgets about it.
Also you can't really have these linear stories as repeatable soft bad endings that are very easy to repeat, I mean look at Dol they have actually repeatable soft bad ends that are not being spammed and are not linear with a grand ending every time, that makes it impossible for the player to return.