Review Detail of Aurey in Demon's Virtue

So, firstly, Thank you so much Author, the story at the start is absolutely amazing. it intrigued me to read on. BUT after which, when the mc adopted the children, the story just went downhill... well it's a bit before that actually. The cards that only have 52 pieces are in front of mc when he need it, the antagonists are like 1D character with no brain, this also include mc after he got the children, the general that holy empire/kingdom literally sent to negotiate with gods, and even 7 lords of sin. it's just frustrating how the story started so high above average standard. I understand that the mc supposed to be smart, but what about other people who live for tens or more of years. The world background is definitely lacking, the mc read books for years without using any actual knowledge he gain from them. when he read general knowledge book, kingdoms on the continent isn't even mention. it's like we switched Author even. All in all I liked it before, but I'm sorry Author-san, I need to drop this soon. btw I can't wait to see how great your 2nd book will be when you write it with experience from this book, I'm sure it would be great, keep writing!! btw(2), i think i will read it a bit more bc i just don't have anymore books to read lol