When he started thinking all negatively about everything and that it's the worst just because it's something he sucks at, I wondered if this was a flashback, but no, he's just a bit dumb.
That's some... uneven dedication of prez. They're so alike.
Is it going to happen next chapter? Well,
start to happen. It's not going to be over in a chapter. Don't think I've seen a sports festival preparation this long before.
Thats the point. More chapters mean more volumes, more things to sell, more money, which leads to more chapters, and it gets even more slowed down.
I find that almost all manga slow down as they get further into the story. An early arc might be only a few chapters, but a late arc can be as long as the rest of the manga combined.