I would equate "Eat the Rich: The GameStop Saga" to a documentary made about Casey/Kaylee Anthony that omitted the evidence found in the trunk of Casey's car, did not mention Casey's behavior following the disappearance of her daughter, and was written by Casey Anthony herself. For anyone remotely familiar with this infamous case, you get the picture? Such a misleading documentary with essentially all of the evidence omitted would of course skew the story itself, but having the storyline dictated by Casey herself? You can be sure the information provided will be biased. Would you trust the information provided in a documentary about a murder written by the prime suspect? No?
This is what "Eat the Rich: The GameStop Saga" is. A documentary outlining events with key details removed, created and bolstered by individuals with not only an extreme bias, but also intentional ignorance of the totality of the facts. If you're looking for tangible fact, this documentary is not a source you should look to.
I always gather information from a variety of sources whenever I decide to read up on an event/topic. This ensures that I do not succumb to bias and am able to form my own independent opinion. If you would like to get more of the facts and form an opinion for yourself, I would recommend giving "The Diamond Handbook" a read. Just google "The Diamond Handbook Reddit" and you will find it.