Personally, I feel the same way: she's such a sweetheart who's finally getting out of a lifelong mentally, emotionally, and sexually abusive situation, and I want her to have a safe place to grow into herself and work through her trauma. I honestly can't bring myself to hurt her, even if she is just a pile of code in the end.
But that same thing is what makes her such a good character to break. She really is bully-bait. She's right at that intersection in her story where we get to choose: she's just independent and confident enough to flee a horrific situation, but also just cowed and traumatized enough to feel guilty about it and think she'd deserved it. For some folks, the choice to show her cruelty is hot. You get this incest sex slave survivor who's sweet and innocent, who ran into you and put her trust in you, and rather than getting care and love like she needs, she falls right back into someone who's worse and will convince her that that's where she belongs. Some people really love the fantansy of mentally shattering someone like that, and since she's not an actual person, it's a safe, healthy way of exploring it. Maybe you like the idea of being the person who gets broken down this way, and since there's really not much for that for the player character outside of bad ends, Ryn gets to fulfill that role.
On the other hand, you get some players who are working through personal trauma by bullying her: maybe you identify with Ryn and reprocess your own abuse through the eyes of your abuser, or maybe you want to break what she represents to you.
Then you have people who aren't really invested in her as a character and just want to see those scenes. Or, you have people who are really into the roleplay aspect and are playing that kind of character because they want to play a really fucked up route.
But essentially she was kind of meant to be this sort of character: that's her par-kink-ular niche to fill in the game! If your kink is to break people, she's the perfect candidate. If you love whump, she's the perfect candidate. If you're a s*ppy r*mantic twat like myself who loves c*mforting and s*pporting people, she's the perfect candidate.