The earliest use of this term I can find is here: https://andrewbrown.substack.com/p/the-inhuman-centipede

It was also used as the title for this post by Cory Doctrow discussing the same problem: https://pluralistic.net/2024/03/14/inhuman-centipede/#enshit...

There is also https://en.wikipedia.org/wiki/HumancentiPad (which is almost surely an homage to the movie) which was 2011 and tied in all kinds of tech-aspects like licensing and iPads.