Why do every mc in another world says, "so slavery still exists in this world?", ours has more slaves right now than at any point in history, so you would have to be disconnected of everythig to think it doesnt exist.
Why the mc becomes a horndog the more the game advances but at the same times acts like a virgo when a girl is foward, why he just stands there and do nothing mid fight while everyone is in danger. Why he doesnt train anything, doesnt investigate or learn anything and doesnt know how to 2+2 obvious stuff.
This kind of mc at some point gets annoying and kills any interest in the story.