To preface this, I already know the abridged version of what all happens in the story, and I also know what the internet thinks of Ava. So I wanted to play it for myself and see if I can find these so called unforgivable sins the character does. I'm up to Eden-9 (rescue Jakobs planet, right after Maya gets merced), and I haven't really seen anything Ava does as offensively bad yet, and I feel everyone hasn't done anything out of character.
So essentially from what I've played so far, she hasn't really done anything deserving of hate yet.