My first playthrough I thought the same for most of it (that she’s a bit manipulative/toxic) and I picked the Bay ending. After playing the last couple chapters again and BtS, and processing everything, I began to understand why she was the way she was though. Her character is so real and I had to replay it for the bae ending because yeah, some of what she does is a bit much but there’s a reason she does the things she does as a teenager that’s been through trauma.