I support the mc all the way. When the mc first reincarnated into the current world world he is in: A girl almost killed him thinking he was a noob. If he wasn't strong enough, he would have died immediately as he arrived in the world. That basically means, the world follows the rule of survival of the fittest: do or die. I am angry at the examiners for putting his graduation on hold. Why should the mc care about the sword's secret, when his goal is not to become a ominiscient being. He just wants to go home. The people in the world are basically NPCs in a game because they can be reset.
1. Do not think of the people as if they are real because they are programmed by the examiners.
2. As a reference to cobra kai; strike first strike hard no mercy. Do we know if the elf king has something up his sleeve because they are programmed by the examiners. So it is better safe than sorry.
3. Just give the mc a break. The mc has been trapped in another world for a long time so it could cause a lot of damage to his mind. Note: The mc is not a weeb like all of us. The mc just wants to go back to his world and doesn't care for all the mysteries and drama the fantasy world has to offer