Edit: PostScript, I found a good article.
https://www.flickeringmyth.com/2020/01/its-chinatown-jake-the-joys-of-the-unhappy-ending/
Edit: PostScript, I found a good article.
https://www.flickeringmyth.com/2020/01/its-chinatown-jake-the-joys-of-the-unhappy-ending/
Not sure if it qualifies as nihilistic, but Upgrade (2018) definetely has a very unhappy ending