Being creepy by stalking my past conversations instead of arguing the point at hand, and ironically furthering my point by mistakenly using a study on Canada from 1989.
American test audiences literally said that for I Am Legend which combined with studios unopinionated cowardice caused them to ruin the ending, amongst many, many, many other times that test audiences have given bad artistic feedback.
His anger should probably be focused at the showrunner / studio, but I’m guessing he’s not risking burning those bridges so is instead blaming the only other party in the decision making process, the test audiences.