>Whether this is a substantial contributor is difficult to ascertain because people in the tech and filmmaking industries are unwilling to publicly acknowledge that this might actually be a problem.
Alternate take -it's not a problem and they're actually serving an audience which enjoys that content.
In the case of Netflix specifically, the problems that are driving people away are non-partisan in nature: shows being cancelled early, arbitrary price increases and clamping down on the password sharing policy.
None of those have anything to do with the culture war and everything to do with colossal mismanagement by Netflix. They'd be unchanged even if NetFlix's content was to the right of One America News.