It’s been forever since I messed with this sort of thing, but could you use something like Wireshark to see what programs are sending network traffic? I see that you’ve already gotten a reply about pixel dungeon specifically, but if this is an ongoing concern for you it might be useful to know how to check yourself for an arbitrary program. Iirc you can just run it and it will show all packets being sent/received by your machine and which programs are sending them. I haven’t used Wireshark in over a decade, but a quick google seems to show it still exists, and if it’s like I remember then it shouldn’t be hard to learn how to use it.
No idea about the movie, but I wonder if figuring out the exact quote would be a useful step in the right direction (making it easier to google, ask about, etc). The closest I’ve found so far is “The meaninglessness of suffering, not suffering itself, was the curse that lay over mankind so far”, from Nietzsche’s Genealogy of Morals.
I assume that the movie used a correct quote, so it should be possible to find the quote without knowing the movie. If the movie invented a brand new quote, then the idea of using the original quote as a stepping stone towards finding the movie won’t work.