The first time I read about Monsanto being evil it was in the fiction novel Freedom(TM) by Daniel Suarez (sequel to Daemon).

Daniel Suarez had neatly integrated Monsanto suing farmers[1] into the storyline.

It's a great (neo)cyberpunk read, as are his other novels.

One of the things I love about novels of this style are that they prompt me to go off and learn more about a subject.

[1]: https://www.theguardian.com/environment/2013/feb/12/monsanto...