Which anime had a useless main character at the beginning, but gradually became stronger!

"Battle Through the Heavens" was a series of online literature. The main character, Xiao Yan, was originally a trash youth with poor talent. However, through continuous hard work and combat training, he gradually grew into a powerful martial artist. "The Peak of Martial Refinement" was another online literary work. The main character Xiao Yan in this work was also a trash youth with poor talent. However, in the process of growing up, he gradually grew into a powerful martial artist through continuous hard work and challenges. Other than that, the main characters of " Full Time Expert " and " Douluo Continent " had similar experiences as losers at first, but through continuous hard work and combat training, they eventually became powerful characters.