Having looked at the other reviews on this site, yea I agree with some of them seeing at what chapter the reviewers stopped reading this manhwa. I agree that quite early on and even midway through the series, there simply are too many disturbing scenes and scenarios, and too little humour. At one point I even started wondering if the manga artist is just sadistic or does he have a warped mind, to think and draw some scenarios.
There are many repetitive scenes, to the point that I got sick of them and wanted to quit halfway. However, the art was definitely very good and depicted the action scenes very well. I appreciate how the artist went out of the way to explain some mechanics of the fighting. It kind of reminds me of Kenichi: The Greatest Disciple, as well as tons loads of other fighting comics out there.
One point this manhwa does much better than most other series out there is that it is very realistic. Realistic to the point where the fantasies of the weaker party staying uninterrupted to the competition is totally destroyed. It is disturbing and unsettling, but with this it becomes a solid series.
The clear purpose of this series is revealed at the end, and to not spoil this series, all I would say is it really is enlightening to read this manhwa. If you can't stand the cringy middle portion of this series, just skip to the last few chapters.