Yeah, original Summer fit the story much better. No one is soooooo in love at 12 that it ruins their life. Hell, most kids who lose siblings or parents to tragic accidents or disease at that age learn to move on by 18-19 years old.
This almost certainly depends on the person. I'm not qualified enough to give an educated response, as I am not a psychologist, but I would think that certain situations would affect certain people differently, no? Some people find love earlier than others(though rare, it still happens), and that seems to be the case here. A coworker of mines has been with his wife since the age of 11, so while it may not be considered normal, it does happen. Being in love at that age, that is. Also, it seems like the "love at first sight" trope was used here. They knew each other years before they were 13, so we still do not really know how deep their relationship was. From what little we saw in the flashbacks, it seemed like they had a pretty deep connection.
You never really move on from things like that. You learn to live with it, sure, but move on? Not many people are able to do that unless they weren't close to the person at all. In most cases, if therapy isn't taken(in which it seems like MC has only just recently begun taking therapy), then you'll find them lashing out similarly to MC. If a healthy form of coping isn't found, then depending on the circumstances of the tragedy, it can seriously mentally affect people. People cope with drugs, alcohol, sex, etc. MC coped by closing himself off to the world and getting into fights for Nami. You'd probably be surprised how non-different that is to what many people do in real life. Depending on the severity of the trauma, it can affect some people for life. Forever changing many of them, one way or another.
I get around it by ignoring the new backstory and remembering the original. It's my brain, I can do what I want with it.
Lol, surely this was a joke? I'm sorry but I am not fully fluent as yet, but if this is how you truly feel, then I don't think you'd like
any future updates lol. The rest of this AVN's main plotline will be based on the backstory written by Ocean(which is superior to the original in every way, objectively). So the backstory you seemingly deem unrealistic will be the backbone for the rest of the novel. Just pointing that out lol...
All in all... that was a really ignorant comment lol(if it wasn't a joke). Not because you haven't seen something, means it does not happen. The world is a really big place