I kind of get where you're coming from. While rutting around in the content to see the good girl scenes, I found that I had to take it off script and go bad girl occasionally to build up enough bad points to unlock the options.
There's a downside here that merits consideration. The exact balance needed to unlock them can only be found by trial and error. The rich variety of paths you can take through the criss-crossing story branches actually works against it here, as you are very unlikely to luck out and strike the exact amount needed. For example for some of them I figured out I needed 10 to 12 bad points, while a good girl run would typically have me in the 3-6 range. This limits options in story development which you could consider fitting for the personality your balance represents, but unless you're aware of these options ahead of time you're liable to miss them altogether.
Then again doing multiple playthroughs to explore those combinations and find those scenes actually led me to some pretty distinct and rewarding paths. Eva's really done a great job of making very mutable scenes that don't feel like a plain visual novel mad libs. It does come together well when you don't kick off either a pure or corrupt game, but start off pure and corrupt later on in the game. Having Ash start down the path of corruption around the time of Eric leaving, left me with what felt like a completely separate game experience in its own right where there's an equally qualitative atmos of Ash coping with situational changes thrust upon her rather than simply her succumbing to temptation. Where it mixes elements from both paths to create what feels like a brand new third path.