I'm sorry to hear that aspect of the game is making it difficult for you to enjoy the experience, Regis12. But I do thank you for checking out the game & giving it a try anyway. Best wishes to you.
Not to belabor Regis12's point, but to provide additional perspective:
Ravager, a game about being an evil dragon, had a similar issue where a minor named character you meet in the prologue had so many requests for content that she, at some points in development, had as much content as the planned companion characters. The difficulty with any romantic/eroge game that involves characters like this is that they will be someone's favorite or even become surprise breakout stars.
Afaik, you didn't make the choice of forcing someone into the role of courtesan after introducing them as a potential love interest. More broadly, however, the nature of lewd games that allow multiple romantic partners is that there are players that are going to take the harem approach and refuse to give out anyone. It's the catch 22 of the genre. As a creator, you don't want to have underdeveloped characters, but the more you develop a character, the more likely they end up in the group of "I don't want to give them up because I don't want to miss the content associated with them."
Your choice, ultimately, if you want to cater to that. Still. I thought it might explain the perspective in a different way for your consideration in current/future projects.