Questions: If One Punch Man only needs one punch, what are the challenges he faces? Is it trying to make the punch connect in the first place? Does he have low defense and/or speed?
The other heroes hate him cause of how amazingly fucking powerful he is compared to them, and the public hates him because he fails to meet their stereotypical view of what a super hero is supposed to look like.
He does end up facing someone who can withstand his punches. It's worth the read/watch because of the way they mix humour and action while having a decent storyline.