I went to a very respected public school, and went through the college admission process a few years ago. What I think a lot of kids forget is when they apply to schools like Dartmouth or Harvard, BC, or Bates, they're not applying to just a school. They are applying to a private business. I was 'diverse', had great grades, blah blah, but it's not because of those reasons that any school owed me anything.
I definitely find her bitter. Rejection isn't a new thing, and those that are rejected by colleges just need to deal with it.