Sorry to see you having such a hard time, but thank you for sharing. It's also great to see so many of your fans commenting how great you are and why you shouldn't feel the way you expressed.
We got your back!
"Coolness" is such a relative term. We don't need to let anyone decide what "cool" is. For me, Sung in the coolest thing in the universe.
Then, we also need to be realistic. Actors need sponsors. I don't know what exactly happened and it is probably not just one time that he feels "rejected." It might be our fault -- fans -- being uncool or not so fortunate enough to purchase a lot from those who need to advertise their products using icons like Sung. I shouldn't pretend like I know every fan of Sung's. But this demography is not that rich enough to purchase luxury items. Thanks to these days' technology such as SNS and smart phones, it became easier for us to show our support to actors/actresses online. We became a part of "big data" to be analyzed by those who want to "sell." I may be totally wrong, but it's just AI that "reject" actors because their fans do not have purchasing power. I'm saying this because I'm in data analytics industry.
I know, it's all my speculation. Things may be a lot more complicated. The only recommendation I have at this time is, he can probably touch up his hair color. Just Kidding.