Just to hand-wave all documentaries on Netflix as not trustworthy is not the way to go.
Here is the study on residents of the Ohio River Valley where Dupont dumped water runoff from production of PFOA (C8). The residents won a class action suit and used all of the proceeds to find the largest study of it's kind. I suggest people watch and draw their own conclusions.
https://www.ncbi.nlm.nih.gov/pmc/articles/pmc3734500/