3GGG:
You saved yourself some time by dropping that one. I forced myself to finish those last four episodes... can't say it was worth it. The disservice to all the female characters really got on my nerves. In fact, the show should be renamed to "Gary Sue and his minions". :/
I could already tell, they gave the rest of the characters a backstory, but there was no depth. A lot of things made no sense, especially the fact that he could fight extremely well even though it was his eyes that got enhanced. I got suggested to read the manhwa and I can see where things went wrong. I feel bad that you actually had to go through watching the whole thing :(