While him being good at hot scenario is true, I think you are dismissing IMO his biggest talent, which from the games I played so far he seems unparalleled in, and that is attention to details across multiple possible routes and scenarios and all of them happen as consequences of what the MC has done so far in the game. Every small variation in renders and/or dialogue comes as a consequence of past choices, its unfortunate that one of those had an undesirable result for you, but if you treat them like a monster constantly, it makes sense for them to try to escape their fate, eventually.
Nicky specifically since among Vaughn, the Loan shark dude, Brent and MC, MC on the dark path has done the worst to her, not even close. Expecting her to take it from start to finish of the VN, it would mean character progress hasn't happened and in any type of media where characters end the same way they started the story are badly written. And Neon is not a bad writer.
If you were expecting this to be the Dark Version of WVM where no matter how you play you still win everything, sorry, then you haven't been paying attention...