First off, a possible typo - on pg. 16, Sarah calls Rashida a loin (and Rashida refers to it on pg. 18, using the same spelling). I think you meant lion?
If you did mean loin, I don't think it really works there. It doesn't make much sense as a sanitized swearword, given the f-bombs that are dropped in the same scene, and as a reference (to Iximaz's Loin!Sue?) it's a little too obscure. Even if it's not meant to be a typo, given Rashida's leonine nature, it feels like one. If it's intentional, I'd have the characters explain it in-text.
Also, the link to the badfic doesn't work and I can't find it on the author's page. I don't know if it's been deleted or if I just don't understand Wattpad, but I figured you might want to know.
As for more general feedback, I really liked the conflict between Sarah and Rashida. It felt like it developed naturally, and did a good job representing the tipping point between "quarrelsome partners" and "negative relationship." I would have liked to see a little more resolution to that argument, although it may be that that's coming at some point in the future.
Personally, though, I felt like you tried a little too hard to force the badfic into being something it wasn't in order to justify your treatment of it, if that makes sense. I'm probably not in the best position to comment on this, since I don't know the fandom and can't find the fic, but I didn't really understand why you felt V.R. was salvageable based on what you showed in your mission. Especially based on the first passage you quote from the fic, she comes off like a very blatant Sue. Even more, she's one of my least favorite variations, the Grimdark!Sue who turns canonically good characters into villains just so she can look badass by opposing them. Within the mission, you try to excuse her by saying she genuinely wants to help Pit, but I don't buy it. Lots of Sues claim that they want to help their targets. Here, the fact that we learn of Pit's issues through Violet's PoV reinforces the idea that she's the one responsible for their existence. And given her relationship with Pit, it feels like she's trying to reshape him from his canon characterization into the angsty rebel that she really lusts after.
I'm not saying that that's the only valid interpretation of the story. However, I think it would make the mission as a whole seem stronger if you focused it a little more on V.R.'s recruitment. I know that the whole issue with Pit is fairly complicated and needs to be explored, but her recruitment is kind of just thrown in there, and it feels like an afterthought.
Ironically, it also muddies the issue of Cupid's recruitment - by making him more responsible for the fic's flaws, it makes his suitability as a recruit seem more questionable. If you'd just made her the main perpetrator, I don't think I would have any issues with his recruitment. In that sense, I think killing Violet and recruiting Cupid would have been the "cleaner" option, though maybe I'm just being overly bloodthirsty, or prejudiced because I really dislike needlessly grimdark fics.
Sorry for focusing so much on the aspects of your mission that I didn't care for! Overall, I though there was a lot of really good stuff in there, but I wanted to make sure you understood where I was coming from. I also think that expanding on some of the stuff, such as through an intermission, would make a big difference. There are some really interesting possibilities with your decisions, and it may be that I just need to wait for them to be explored.