So getting back to the major error, it basically has to do with how majority of Earthlings are ruining Paradise. I felt this was really weak because the Gods should have enforce a better selection criteria and methods. The entry rules just left a lot of scumbags into Paradise. Anyway that's just the most glaring complaint I have to otherwise a very solid LN.

As some others have noted there's at times a huge disconnect between what we've been told about the MC's past and how he acts in the present. He goes from supposedly being a scumbag who borrowed a sh*t ton of money from his family and lost it all gambling and then continuing to beg them for money to an innocent child (As in he literally acts like he's 3 years old). I'm hoping this is temporary and the story will pick up but I guess I'll see.

she basically knows when an enemy with the potential to become strong is becoming more renowned so she employs several methods to deal with them earlier unlike other villains which are way too confident

Seol the main character has this side in which he is really childish, him pulling pranks on others is acceptable even though it feels like goes too far at times but he later develops this weird complex in which he hugs some women when he sleeps and honestly we can do without this. There is also this recurring gag in which someone basically talks to him implying to set him up with one of the female characters of the story but he always chose to ignore it or seem like he didn't hear it. What's more he should have really noticed the feelings of some of the females in the story considering one is basically waiting for a chance to reverse r*pe him, I could think that he is rejecting the advances because he still has feelings for his ex-girlfriend but the way it looks, that isn't the reason and more because he is afraid of relationships

Another thing to point out is that the activation of his "future vision" is vague and we don't exactly know what triggers it, granted that I like every scene every time it triggers since his character changes and we don't see the MC as I've just describe above.

I could also point out about him sometimes forgetting to use his "Nine eyes" at times just as pointed by other readers but then I realized that every time he used it, he gets distracted for a bit and ends up thinking about what he sees using it and forget other stuff so it seems he only ever uses it constantly if he would mostly depend on it when making decisions just like when he got left behind in the parasite's territory. Not to mention he is trying to keep "Nine eyes" a secret so if he ends up always reading other people's status every time he meets someone he would need a few seconds to actually read all of them which feels a bit suspicious