I'm the polar opposite. I would have basically zero interest in this movie if it weren't for the leads, both of whom I find unusually appealing. I fucking love Dane DeHaan, both because I find him attractive and because imo he's a good actor. And I like Cara Delevingne quite a bit, and also find her extremely pleasing to look at.

I can see how if you didn't like the look of one of them, you wouldn't like the look of the other, though. They are very similar looking. In fact, they look way more like siblings that 95% of the characters who are actually supposed to be siblings usually look.