The protagonist is a loser, and it must be a fantasy and can be broken to become a genius novel or a rebirth novel. I have seen everything.

It's not that a loser becomes a genius, but that the protagonist is mediocre at first, but he has a lot of brains, and then he goes to the top step by step with his wit and hard work. In the meantime, he was chased by his enemies, which led to the killing of the whole family. Then his wife died, and so did his son. In order to bring them back to life, he practiced hard and discovered countless secrets.

Seven-star Yuheng's Flying Domineering

In the rebirth novel, the protagonist plays a game to complete a task that no one else can complete, and the game reward is being struck by lightning. Since then, the road to practice in different worlds has begun.