
"Junwoo realized that it takes practice to like himself."
It's a long process. I'm still learning to like myself too and it has been years... I'm the type of person who find it very easy to compare and downgrade myself so most of the time it's difficult to find myself as attractive, properly-functioning social being. Every now and then I'd feel sad and think I'm a pathetic person. Maybe this negative side of mine would gradually disappear as I grow older and gain more life experience and wisdom, but as I'm now loving myself is definitely a constant challenge.

Towards the end I became sympathetic with Wonho. He's not a bad person, just someone who had made bad choices. He resorted to sponsorships not because he's untalented, but because he doesn't get the chance and opportunity he deserved. He was a bad partner to Minki, but again, he's not a bad person (just with a slight anger issues, I guess). He clearly has the passion for acting but as a person he's been so unlucky that I can actually relate to him.
I love the main pair but as story drags on I felt like their stuffs became a bit bland. Both Minki and Taeyoung are a bit OP--genuine, loyal, sensitive, almost without a fault. There is no actual character development. The second pair actually has more complex problem, and flawed personalities that I found much more interesting than our main pair. They made mistakes, they learned and grow for it. As we do too as human beings.
Read it. It's good and well-crafted.