As a devout introvert, I'm not turned off by Squall's standoffish attitude or silent ways, but I don't find his callous treatment of people sympathetic in the least. Although Squall's motives are explained later in the game, making him easier to understand, he still isn't very likable. In my case, I just don't like people who mistreat others because of their own personal angst. Even more admirable is the woman who falls madly in love with this splendid character. In more than a few ways, Rinoa is even more unlikable than Squall.
Squall manages to come off as reasonably intelligent and capable.
For the most part, Rinoa doesn't. She is clearly intended to be an intelligent and self-motivating woman, but none of the events of the story support this. For the most part, she has to be rescued, guided and championed by the other characters in the story. I don't deride Rinoa too much for her infatuation with Squall. Somewhere along the way, I think we have all pursued 'hotties' that were bad for us.