
Are we reading the same story? It was stated MULTIPLE times that there is no way for Wonho to make it big on his own since he doesn't come from a rich family or has a family with good connections. Unlike Minki Wonho does have talent for acting but that's not what matters in the entertainment industry.

What if, he will never know. It can be stated but it can still happen. There artist who got laughed at and said to they would never make it. They did. He made the choice to take the paved path and it backfired. Maybe in korea things work like that, but even beside that I think he got famous and his roles where good. He had the talent he could have made it without sucking it up.

The story doesn't take place in America where entertainment companies like to sell the "came from nothing but has built himself up because of his talent and his big dream to become an actor" storylines for their artists. Read the next three chapters when they come out and you will understand. You might as well check spoilers for chapter 75 that somebody posted today on this page where it's stated in the raws that Wonho is a replaceable "nobody" which had no changes from the beginning (even tho we all know from the flashback from his college days that he was the most talented actor in his class, but had to do the cleaning in the school to be able to afford his classes since his family was so poor).
Wonho got what he deserved. In the end you only got yourself to blame for your own choices you make. Wonho could have made it big without all the help he has gotten. Cheating your lover for years is for whatever the reason is plain wrong. Al tough I think they should have broken up way earlier but I guess when your in love you want to look the other way.
I think it is tragic what happens to Wonho but he paved the path himself now he has to swallow it. In the end you got to face the consequences and the longer you wait the harder it will be. Min-ki probably would have forgiven him if he had told the truth and stopped after the first time, heck maybe after a second time. The thing is Wonho kept lying while Min-ki already knew and was waiting for Wonho to come forward.
The only one to blame is yourself in the end, no amount of blaming others is going to make up. You are your own writer of your own story and no one else.