Is there any source as to why it was removed? The OP says it was because of a 'massive Twitter campaign' but I can't find no source on that.

I can only find some lukewarm Reddit discussion, it seems to just be a bad essay? https://www.reddit.com/r/books/comments/1mcuva/jonathan_fran...

or see this review https://observer.com/2013/10/bigmouth-strikes-again-what-in-...