it is a reasoning already addressed.
Maya says she was convinced the relationship was practically over, until proven otherwise we have to believe her and for sure she did not know that Josy was coming, and that she would never make it to the BR
she is not 100% convincing but this is it, Mc believes her, and it is up to us to believe her too.
DPC writes, in my opinion voluntarily, Maya in order to create a certain resentment towards her, practically immediately.
I do a quick recap of how DPC makes Maya "unpleasant" to players (not all of course), I am of course referring to players who had an interest in Maya
1) at the end of the movie night in bed MC declares his feelings, that was the moment Maya should have stopped him and she doesn't
2) on the evening of the grinding, we are bombarded with Maya's thoughts (in retrospect it is very clear that Maya is a Lesbian, but at that moment we are not understanding it) and they are all "selfish", all about the sensations of her body and the fact that she believes what she feels is wrong, even when she kisses Mc she tries to think of Josy (we don't know then that it is Josy, but this is)
3) when MC reunites with Maya after the cum-petition, she doesn't mention the grinding, but asks him to help her, making out with her. a request I would say quite tactless, as well as useless since MC is not a DIK yet. on that occasion MC can ask Maya to talk about it later, which seems to me the only sensible thing to do
4) when MC returns to the dormitory he finds Maya in the dark, in the most depressing scene of the game, and he has to force her to be able to talk
in my opinion at that moment the damage between the players and Maya is already done, the end of chapter 3 only takes away the hope that they were only misunderstandings