Is he the most cucked mangaka?

Well Mashima actually knows what the audience wants, which is big tits and fat ass and buff guys and nest setpieces. Depth and nuance be damned, I want my popcorn manga.

Kishi has none of that, and got Fire Force's brother to draw his flop cause flopping it himself would be too much work.

I mean... you could just plan the story out before publishing anything.

According to Kishi, he did. But if you get your potential chapter count gutted from the start, all the planning goes out of the window.