Writing Quality - Some flow issues here and there. There's also a couple grammar issues throughout every chapter but its tolerable. 2/5
Stability of Updates - Pretty bad... there's 10 chapters and this has been out for 9 days... Even though it's 1 chapter a day, when it hasnt even hit the 25 chapter mark, you should have at least 2 chapters out a day. 3/5
Story Development - Too unrealistic. The system just straight up hands him things, the quests difficulty aren't relative to the rewards. You say you made this fan fic because you thought the system gavee the original MC "useless cards". But none of the cards given were useless, they're all used in some way or another that gives the original MC a advantage. You simply give your MC op cards for a power up with no creativity at all, no ingenuity to make it different from other system novels... Finally, the worst thing is that there's absolutely no explanations on how anything even happened. 1/5.
Character Design - The character interactions all feel extremely fake and unrealistic. Not only that but what type of monster feels absolutely no sorrow or guilt for taking over someones body and transmigating? The guy just died and he isnt relieved that he managed to reincarnate or sad that he left his family or anything, all he's thinking is "wow this body is so much better than the manwhas body haha so fun, lets go lie to the dead body's sisters face!" Also, the MC has no personality, he's staler than 30 year old bread, the school and characters in Supremacy Quest was built around the fact that the MC was goofy, so it all flowed well. Here, it just looks super awkward and trash. The worst thing though is that no one doubts or thinks anything when the MC's appereance undergoes a COMPLETE change in a WEEK. (The Mc went from the original manwha appereance to the book cover... NOT SIMILAR AT ALL, THATS NOT HOW GROWTH OR PUBERTY WORKS...) 1/5, if i could, i would give it a 0/5.
World Background - Complete garbage. The author clearly has no clue as to what type of universe Quest Supremacy is in. (It's part of a whole webtoon universe, it all ties together and eventually they all meet up. Manager Kim and Lookism is an example.) The Author has completely messed up the laws of both the world and universe the story takes place, completely cutting off any routes for the MC to take, and essentially making it a 100% chance of this novel getting dropped. Again, 1/5 but if i could, 0/5.