At the start of our protagonist's story, Dowon clearly says that if they want to witness his full power, maybe they should have an ancient dragon come down or an earth-shattering boss appear. And when the event where the nobles and wizards came to witness his power came, he did perform a miracle. He basically reversed time, and I think that's a powerful feat. But other than that, the novel really downplayed and just outright nerfed this character.

I think it's fine if you write the protagonist as a dumb and innocent character but this is a bit too much, the author do false advertisement for his own protagonist, saying he has the power to save the world in the beginning but when sh*t hits the fan this guy can't even cast a basic protection spell, teleportation and I don't even think he can sense magic. There is LITERALLY A GIANT PROTECTION SPELL BEING CASTED AROUND HIS ASS and he can't sense shit.

you're wondering why I'm complaining about such a thing right now, let me explain myself: A healthy relationship - whether romantic or platonic - would always have 2 people in a tug of war type situation, they want to do acts of service, affection, etc.. To each other, both always trying to be a better partner for the other person. Our couple, Dowon and Yiyang is kind of poorly imitating this relationship and frankly, it's a bit toxic (intentionally or not) one side is trying to confine the other (with the excuse of it being better for the other but actually I think it's obsession) while the one side is leading the other on a rope without setting clear directions (Dowon is unintentionally flirting/saying things easy to misunderstand, which still produces 'results' - intentionally or not). And the most important thing to have in this tug of war is leverage. Leverage in this context means: 'Things I can and would do for my partner' and 'Knowing what my partner lacks and filling in the gaps for them'

And this is the thing that the author f*cking slipped and missed the whole point. The author gave alllllllll the leverage to the top, Yiyang, and our bottom protagonist over here, despite having the a job history including 'saving the world twice' can't do anything right for the life of him, sometimes clumsy help can even the deadlier than malicious intent and the prime example of this is Dowon, every time Dowon tried to "help" Yiyang it will inevitably leads to Yiyang becoming a cleaning lady for our protag. Even at chapter 30 I have already sensed the pattern.