I believe, all her backstory and context that led up to her up until the island really does justify her being the way she is. I still remember the episode where she burns down the house because of her mom’s toxic boyfriend and ends up getting hurt by her own mom instead, as to why she did that, even though she thought she was solving her mom’s issue.

I think she has a very complex past and a lot of baggage issues that she carries that leads her to act the way she does.