You're kidding me? This dude is awesome! I was expecting him to be average (ala second life dude), but this fucker is straight up colorless. No affinity for magic at all, not a shred of magical talent!
And this glorious bastard fought off the demon king alongside the hero and most probably for geniuses and fucking survived!
MC should be damn proud of his achievements and effort, not have a stroke out of despair. Though the final "I'll reach the pinnacle of magic without any talent, I just need more time." was good.