Spoileries:
When I first finished the game, I felt a little conflicted. Throughout the story, it seemed to me that -- at best -- Arron was paranoid and retroactively rewriting the history of their relationship and -- at worst -- was genuinely just a terrible partner. So, when it ended and I interpreted the ending as Arron having been right, the whole thing felt a little off to me. Now, having taken more time to really think about the ending, I believe I probably misinterpreted the end on a first read. With that new understanding, boy, is this one heck of a story. I really love the writing, the art direction, and the contemplation present here. I don't think my interpretation of the story is likely to be correct at all, nor am I certain there really is a single intended answer -- who knows. I really loved it; great job
Edit:
Thinking about the fish scene a bit more, it really does seem to me that Arron probably really is just paranoid and rewriting his and Mal's history in his mind. If that scene is to be believed and if Arron's words in that scene are genuine, it really seems that he, at some point, cared about Mal on a genuine level. I know that's an optimistic reading, but I like to be optimistic in life.