What a derp villain. Reminds me of one from some random anime.
"Everything is destined to end! Entropy! As such, it is the logical conclusion for all things to end, it is the universe's truth! It is my job to bring everything towards its end!"
What a load of nihilistic gibberish. Other than the fact that ""killing" biological lifeforms" won't cause the universe to reach cold-death, the mere idea that they give themselves purpose by claiming that life is purposeless, is just batshit crazy. It's riddled with over the top, poorly written angst.
And that's not to say I am shocked that I've seen such a villain in an isekai, the garbage-pile of all literary works. I have however seen it enough to just go on my own like that.
Goddamn nihilistic villains. Always so poorly written.