Review Detail of Tyson_1102 in Second World

This review is at chapter 80: So my gripes are similar to the others you see in the reciews, but I have a slightly different take. At chapter 25 or 26 the MCs intelligence for some reason takes a steep decline out of literally nowhere. From a veteran gamer who hoards loot just incase he can sell it, to an idiot who questions why his companion brings him an item he can sell, whilst he carries around a pack full of starter grade junk for that exact purpose. My issue isn't the stupidity, as I like character development, it's the reasoning. The author obviously knows the MC is acting stupid, as he had his companion call him out directly for it by having her tell him to pay attention when he is told something and to think for himself. I simply find myself questioning, who is the author trying to develop/write for in this situation? It makes the MC seem mentally disabled, makes the companion seem like she nonstop complains, annoys the reader, and makes the author look like they can't write a decent character. I've found myself letting it audible sighs while reading. All this being said, it's not enough to ruin the story for me, but I know it can for some which is why I explained so much. I see the potential and have heard it gets better soon, so I'll keep reading as most of the other stuff in the novel is quite good and leaves me wanting to see more.