I don't really think that's a fair criticism, as someone who suffers from suicide ideation and has attempted multiple times: Most people don't want to die. Most people want to be heard. Most of us will grasp at any "sign" that we shouldn't do it that we can. I don't think she opened up too quickly, that's like, fair to how a lot of us handle it. The road to recovery isn't as quick and easy as the good ending made it out to be, but it makes sense for the game that it is.
And as someone who lost a very close friend to suicide, maybe the dialogue is saccharine, maybe it is a bit head-in-the-clouds, but god, did it feel good to play through. Because I wasn't there. And I couldn't stop it. And it was really nice to have the opportunity to.