Unlike fantasy stories, people are more complex than that. Things can't be solved by just sitting down and talking about it in one go. Thats impossible.
The feelings you had don't just suddenly go away, nor what you e experienced up till now because of misunderstandings.
It takes long time with lots of psychological counseling to fix this problem.. they all have mild to severe mental problems. The mom is manic depression. The dad has trust issues and has an inferiority complex, and the son, well he's the most normal one, at least as normal as a kid with neglectful parents can be.
Yeah, you can't fix this stuff. It will talk lots of time and working on it together to fix.
Thats why I like this series so much. It has such realistic depictions of mental disorders and their effects, realistic and rather adult relationships, and that it has the balls to show that these problems can't be fixed with some magic talk no jutsu.
So far, I have to say this series is wonderfully well written.