First of all, I think Ah Fu, Yue He divorced because they have nothing in common in their daily life. Two people don't have any communication in their lives, and it is easy to have conflicts when they meet things. This kind of marriage is already unhappy, and procrastination will only make more and more contradictions, so we can only divorce.
Secondly, they divorced because there is no love between them, and a marriage without love is always full of problems. To Ah Fu and Yue, he is an extremely open-minded person. He likes music and doesn't like being tied down. Since you don't love, you should solve the problem in a responsible attitude towards yourself and the other party, so divorce is the best way out.
Third, these two people actually have no feelings for each other. They must have found that they didn't have the confidence to manage this relationship well after many attempts, so they chose to give up. They don't regret their original divorce choice, and Ah Fu and Yue are even less likely to regret it, because it was he who proposed the divorce. Wu Yating also explained this point in the program. Although divorced, the relationship is still good. They are still relatives, and they can care for each other and take care of their children together.
In short, no matter what the reason for their divorce is, since they have made this choice, they will not regret it.