MC almost got killed and lost an eye after his childhood friend (who exiled him from the party they started together, betraying their shared dream) recommended him to do a quest, and boom, it was a FUCKING Dragon's resting place. He has every right in the world to be mad and not mentally stable. The only part that is his fault is that he didn't do his research before leaving for that quest. Why? Because he trusted his childhood friend, so his problem was trusting her!I doubt that she did that on purpose, also him going on raged mode and edgy the moment he returned after he killed the dragon is the most stupid thing to do and a nood plot, and now he's not even listening he's the most stupid MC I've ever seen far.
Did the childhood friend apologize or pay reparations? NOPE, it took her 2 whole years to say fucking anything, what changed? The MC becomes S-rank. Why in the world the MC ever listen to this bitch? Did she listen when he was trying to argue against his expulsion? he wasn't even allowed to make his case, it was a done deal when they exiled him.
By the way you are responding I guess you manga only and not aware of certain details but holy shit, even with what we have in the manga it is obvious who is in the wrong here