First of all, I said "some of the". It's not the worst. Nice strawman, by the way.
As for tips...
Decrease your autoleading. Wild Words works at 100% IIRC.
Make your lines uniform. Experiment with moving words to another line.
Every line needs punctuation. This is English, not Japanese.
Your text should be centered. No, the bottom right bubble on Page 2 is not centered.
The Title is unreadable. Make it two lines.
The only time serif I should be used is when it refers to the pronoun "I", including contractions.
Change the narration font on Page 4. It's WAY too different to the body text.
Same with the screaming font on page 7.
And same with the font on page 12. Action Figure BB is WAY out of place.
In fact, screw it. There are WAY to many font changes.
And so on...