To put it nicely, he was a bit slow in figuring things out. To put it plain and simple, he was an idiot when it came to self-realization. As for Li Chang Hu, he was good at many things but unfortunately when it came to emotions and dealing with his brother, he turned into a stiff brick and couldn't help but nag. So he was unable to help Li Chang Yin there.
Nagging, in concept is a good thing, after all you're just saying an extra two words out of concern and wishing for things to turn out better for the recipient, but with the exception of a select few people who can bear with it, and take it to heart, for the majority of people nagging was just too d*mn annoying to take seriously.
