Consider this, California, the largest state in the Union, has a 45:7 ratio of Democrat dominance in its US Congressional Representatives. That's 6.4:1 or about 84% elected members of Congress being Democrats.
Within the state assembly, Republican voters are also under represented,with assembly members being 60:18. That is a serious under representation of Republican voters when compared to all polling and statewide office election results.
ALL California electoral college votes go to Democrat presidential candidates the six Presidential elections. Yet this gigantic and artificially imposed Democrat advantage in election results, over representation of Democrats compared to popular vote received in the state, is not "gerrymandering" by the criteria used by the frankly and obviously partisan and makers of this 'documentary".
Oh and in fact several of this "documentary" producers (read funders) are Democrat party contributors. Hmm. This is not a documentary, but a partisan polemic, one that deploys a half dozen major logical fallacies. As far as ranked choice voting, or better yet runoffs, why not mention that the data clearly show that would have resulted in a certainty of a 2016 Trump win as well (given the studies showing that libertarians draw 85% from GOP and Greens draw 83% from Dems, and there were a lot more libertarian votes than greens), and would likely have resulting in Bill Clinton losing.