So let's refresh:
The Adult is not only the king.
He has no real responsibilities.
Has has a harem, possibly 12 women.
He constantly does whatever the hell he wants.
Which often include endangering the normal citizens and the students.
But almost always include punching down the MC, that is picking on someone from a height so high it's in the clouds.
Meanwhile the MC has spent his entire life from baby to now 17 year old kid saving the world.
Doing unspeakable damage to his body, see the scars.
Losing so many friends and allies in his battles.
Having spent apparently no time socializing, relaxing, or doing anything but fight to save the world.
So what do we get again? The care free king pick on the physically, psychologically, and emotionally damaged MC who is also this world's savior.
Yeah, that's what I want to read. A kid who undeservedly gets bullied. /s