Solo leveling story was written 8 years ago and at that time not much anime or manga has that kind tropes that solo leveling has at that time. : r/ sololeveling

Taito Ban - News - IMDb

Taito Ban - News - IMDb

Solo Leveling Complete Review

Solo Leveling] Why are suddenly so many haters popping out from their cave ? : r/manhwa

Solo Leveling Fails To Develop The Original Appeal Of Its Prologue

Taito Ban - News - IMDb

Are there any manga / webtoon like solo leveling? - Quora

Are there any manga / webtoon like solo leveling? - Quora

Why Solo Leveling's Unique Storytelling Makes it a Poor Candidate for Anime Adaptation, by Junaid Chandio