That’s kind of a weird critique, because it’s actually consistent with the book. He spends a lot of time talking about how wildly different every person’s interpretation of the event is, and that’s kind of the problem. It’s part of why these movements are illegible to power. He’s very clear that this is his interpretation, based on his own contacts, experience, and extensive research, but that it’s not going to be the same as everyone else’s.
Same is true with the moniker. Whether or not the people on the ground felt that way about it or not, that story, fabricated without input from those on the ground, is what ended up creating meaning out of the movement, at least insomuch as power is concerned. That’s like the core thesis of the book: The problem with that wave of protests was not being able to assert their own meaning over their actions. The meaning was created for them by people like western media, and they weren’t able to organize their own narrative, choose their own representatives, etc.
edit to add: IIRC, he even specifically discusses how the different people in the core group of Brazilian organizers disagree on what happened.