Review Detail of Fullmetal in Apparent Expert in an Alternate World

There's really no common sense with this MC. He actually wastes his limited resources on people who almost killed him. It was mentioned in the novel that if he did not see the reaction of one girl, as she was surprised that he was attacked he'd literally be killed.. Then he uses his limited healing potions to actually heal their best fighter? Great logic and thinking here. The girl he actually saves wants to kill him and kill herself because he saw her naked. Its totally extreme. If she has obligation to kill herself because of tradition of her race, she can go ahead and do it, but killing someone who saved her life? Why does he have any obligation to teach people that tried to kill him? They should be grateful if he just left without killing them or punishing them in any way. After that he summons some legendary pet that literally extorts him yet it is his pet.. If you have a pet in any game, you can decide if you want to feed him or give him anything, in some games they can run away if you don't treat them well but requiring rare resources every time they get summoned would never be normal occurrence.