Stop pretending there are stakes and just let the MC steam roll them already. He could probably walk up to the enemy capital and wipe it out right now.
Dude called for someone to be fired because he didn't like that person's perfectly acceptable use of the English language, and then crashed out over down votes and being explained too why he was wrong.
From their perspective, the only way he could improve this fast would be a genius. We the reader know he has knowledge from his previous life that allows him to focus his efforts to maximize returns.