I don't know what to say, but I guess maybe you should play again and read all the dialogue.
MC's dad was long dead at the time he/she ran away.
Rachel abused MC (which started after MC's dad died).
Rachel was a good mom for Ellie, so no need to worry about her (she's Rachels daughter after all, while MC is not).
Rachel was in some way for MC what MC's dad was for her, obviously not as much, but still...
I don't think anyone would want to give someone "love" who abused them, they would hate them, try to get away from them, some may even try to get back at the abuser in some way or another. That's not narcistitc, that's simple logic, it's human.