system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Can somebody explain to me why Lex Luthor has such an intense hatred for Superman?

I want someone to explain to me in detail the reason that Lex goes to sleep at night with dreams of crushing the Man of Steel.
gpt
There are two layers to this answer. 

The top layer is what others here have posted. That the existence of Superman makes human achievement meaningless. That he's an alien and we can't trust him. That Lex's genius could have ended disease and created utopia if Superman would just stop his endless interference. 

Lex probably even believes that stuff - but he's lying to himself as much as he is to everyone else. 

The real reason Lex Luthor hates Superman is that he is an egomaniacal narcissist, and he wants everyone in the world to recognize him as the greatest man in history. As long as Superman exists, Lex can't be the best. So Superman has to die.