she viewed all of her peers as children since she felt she had more lived experience which is fine
That’s not fine. Her lived experience doesn’t seem to be translating to maturity at a rate worth bragging about whether the claim is true or not. The foundation of any healthy relationship is respect. I think that whether you want to confront anyone about these events or not, you would benefit from seeking out mutually respectful relationships.
Consider whether her actions can really be caused by a fault of yours if she belittles almost everyone in the same way.
If you still have that save file, you might consider tasteful use of an editor to give yourself a chance. If not though I’m sorry to hear that. BG1/2 were a huge part of my childhood and my longtime favorite villain came from the second.
https://baldursgate.fandom.com/wiki/Save_Editors