Why?
Not happy at having to choose between Mia or Helen?
Yes. I'm not happy. Not because I necessarily want to have everything in one go, but because the choice made in the way it is is now pointless. Mia did not catch MC and Helen in an unambiguous situation, so she has no right to know about this relationship. Helen, in turn, participates in some ritual and does not see it as a relationship / romance, so it is not in a situation where she could set such conditions.
Most importantly, however, the way DarkCookie builds the game and the character of MC, makes making such choices illogical when the choice is made between family members. Why? Because this choice leads to a conflict on the Helen - Mia line. Of course, it can be argued that this does not lead to a conflict, but then the story loses its credibility. And credibility is crucial to how high scores the game will collect as a whole.
Maybe many people do not think about it, but such things affect the reception of the game.
Such a choice may also suggest that MC is the reason why the Mia family is falling apart. And DarkCookie tries to introduce MC as a nice, friendly and helpful young man. It is much better to remove the selection here and create it in a place where it does not lead to such problems.