Writer needed more WD-40 (spoilers)

in his effort to squeeze the U.S. automobile industry into the big bad villain of the movie. At one point a character literally blamed the auto manufacturers for segregation, residential redlining, and a conspiracy to dismantle the Detroit streetcar system. The most eye rolling part was the movie’s ending crawl. The audience has just watched the lead characters commit multiple cold blooded murders, conspiracies, solicitations, kidnappings, adultery, wife beatings, bribery, police corruption, etc. etc. and the ending crawl hilariously upbraids the U.S. auto industry on its resistance to catalytic converters! Remarkably, GM - inventor of the catalytic converter in the late 1960’s - is here portrayed as corruptly involved in the industry’s attempt to hide the very device from consumers.