I think that the creator are too considerate and want to please everyone, we know that no one will be satisfied if we want to please everyone.
At the beginning it might be interesting to keep adding new characters, adding new branches. But everyone who has good logic knows that it will backfire, because each will have their favorite supporting character, have their own fantasies and want to continue to get regular updates about their favorite supporting characters.
What is needed in the psychological corruption of the main character is the depth of the supporting characters, not the number of those who corrupt Christine.
For example: Tobey, Christine's young lover, can be molded or combined with several supporting characters, so that Tobey's character is more colorful and more realistic. In Tobey's character, you can get someone who is young, naughty, naive and manipulative etc. Tobey can be combined into Henry (Christine's neighbor's son who is also Adi's schoolmate), Tobey can also be made into Adi's bully and then Mateo and his friends can be eliminated.
This is just one example, and it already saves at least 3 supporting characters, while Tobey's character gets stronger in terms of foundation which ultimately makes his branches fuller and more interesting.
Look at AWAM, especially when the updates are slower and smaller, there are too many characters that have to be cut to make the storyline more coherent and smooth, but it's all too messy to untangle.