No. I am a teenager, and that means that I also have teenager friends. No teenager is like Roxas.I feel like this is a teenager thing. At least for some teenagers.
When he asks SaÃ¯x about what happened at Castle Oblivion, he only cares for Axel, which kinda makes him look like a dick. If some of your friends, including your best friend, went to a trip and you heard some rumors, would you go "so what happened to my best friend?!?" or would you go "what happened to them?!", because I'm sure most people would still ask the latter and show concern for everyone?How many people would care deeply about all of their coworkers/classmates/etc.? It's pretty normal to find a couple you're close with. I believe he cares about the others, but it's on a basic, colleague level.
A stupid reason. As Void said, it was sudden and came out of nowhere.I think it's interesting Roxas was interpreted that way in KH2. To me, Days makes sense as a background. He's angry at Sora, and Days gives him reason to be.
KH2!Roxas was mysterious, kind of a villain, he was sassy, aggressive, questioningâ€¦ he just wanted to be his own person, he just wanted answers. And then we have Days!Roxas, who is this angsty, whiny teenager who acts like a five-year-old and nothing like his KH2-and-onward incarnation. There's a reason people always differentiate between Roxas and Days!Roxas.