As a piece of entertainment, it is more than decent. But it is unsatisfactory in the messages it is trying to get across. It raised very important problems, such as being driven into a corner by a competitive society and being stuck in a poverty cycle, and feeling oppressed and helpless as a youth. These are extremely prevalent and sensitive issues in SK and other countries. The show offers a message that comes from good intentions, but it is over simplified and maybe even insensitive towards depression and mental illness. Throughout the show, there is no empathy offered to the main character's suffering, but rather a lingering feeling of "your pain is bearable compared to many others who have suffered so much more than you". Which is obviously distasteful and wrong in many ways. It's classic victim blaming, coming from an outsider's POV.

Furthermore, it ultimately does not provide any tangible solutions to any of the main character's problems and he will realistically end up in the exact same place. In the end, he's just back to square one with the wounds of living multiple lives and with the guilt of hurting others with his decision. There is no accountability for the further damage to his mental state. I can't help but feel that if that was the route the show was going to take, it shouldn't have presented such severe societal issues through the main character's story in the first place.