I find it really surprising that so many people like Amane. I think she's incredibly annoying. She's short-sighted, narrow-minded, and embodies an anime archetype I despise. The short, pig-tailed, cutesy girl with lots of energy and an inferiority complex. I've seen her a thousand times and I never like her any more than I did the last time. She's stuck in the past and I don't want her getting back with Nene. She needs to learn to face reality and respect the feelings of others. But she's so loud and selfish that she only sees what she wants to. I can't stand her. Chapter 5 is easily the worst so far.
She isn't short. Like of all the high-school characters she is the same average height. Kou is far smaller than her. So I have to wonder where you even got that from?
Inferiority complex? I'd like to see you justify that one as well please. The only one we could reasonably attribute a inferiority complex to right now is Nene.
While it's absolutely clear that her inability to move on is unhealthy, you have to admit that Nene is not exactly doing a good job of moving on either. The way she throws herself at Kou like that is incredibly suspicious.
Anyway, it's your opinion, but I still think you're being ridiculous.