If You Can Be Invincible Just by Complaining, Who Else?

Traveling to another world and becoming a loser? But it is bound to the "complaint makes you stronger" system! Taunt the opponent's moves for flaws; dig into the villain's death scene. When others are practicing hard, he is madly sending out poisonous words; when the strong ones are facing off, he will directly let the opponent break his defense by saying "your ultimate move is enough for me to eat a bowl of noodles". Let's see how the king of complaints can use one mouth to complain all over the world. A different path to invincibility