I think it should to = have ended in this way.
First, it started with the time he became a good Jjajangmyeon cook. And it be = when people found out that he was a clone. but many people helped = they should have been helpful to him and they tried to understand him better. and he overcome his trouma. and he went back to his common life! = He should have been given the chance to overcome his personal traumas and get back to his normal life. 

Today's article:
KEEP ON THE WATCH!
What Has Happened to Decency?—⁠What Does the Bible Say?
The Bible explains why there is a lack of decency today.What has happened to decency?
The decline in decency—
behavior that is good, moral, and acceptable—is being seen around the world.According to a recent Gallup poll, Americans rated the state of moral values in the United States to be lower now than at any other time in the past 22 years.In another survey of more than 32,000 respondents in 28 countries, 65 percent said that the lack of basic human decency today is the worst they have ever seen.The Bible predicted the behavior that we see today.“There will be difficult times in the last days. People will be selfish, greedy, boastful, and conceited; they will be insulting, disobedient to their parents, ungrateful, . . . unkind, [and] violent.”—2 Timothy 3:1-3, Good News Translation.

What the Bible says: “All things . . . that you want men to do to you, you also must do to them.”—Matthew 7:12.


Thank you for reading! Take care

NOTE: Your ending makes more sense since those are the problems he should have faced and overcome in the end.