My biggest disappointment in 2019. Visuals won't be the problem but the story. The characters are thrown in the story without depth/development. Many of them (especially the antagonists) were killed instantly without leaving an impact on the readers. Likewise, the supporting characters were not given any color but fawners of the main character.

You can see the disregard for important characters in the family of the MC. The father arrived in action, then died without giving us any backstory. The sister just became a tool for the MC to show off his enraged side. While the mother was just a lame excuse for the MC to level up that did not even allow the readers to sympathize with because we are more interested in his fighting. Overall, the family that should be the drive of the MC is superficial. No love, care, or attachment in these characters.

Solo leveling is the antithesis of One Punch Man or Mob Psycho (Or even the classic Dragon Ball) on how it treats overpowered MCs in developing stories. He is just a plain "Gary Stu" (I cringe when I used this pretentious term).

I read the manga because it was promising with the visuals and good pacing of the story, but the impression didn't last long. I tried to redeem it by going to the source novel; however, it was faithful to the material so my disappointment lived up. Hahaha, it was wishful thinking.