You make a good point here. He's supposed to be representative of a real-life annoying ******, so the fact that he's an annoying ****** maybe should be more forgivable
I don't mind Jesse's demeanor or performance, but damn his lines. I remember one reviewer said that Jar Jar Binks is a "humorous character written by someone who has absolutely no understanding of humor." With regard to Luthor he feels like an evil genius written by someone who has no idea how an evil genius would act or what they would say.
"You're psychotic."
"That’s a three-syllable word for thoughts too big for little minds."
Huh? That makes absolutely no sense.
Compare that to a similar exchange between Keanu Reeves and Dennis Hopper in Speed:
"You're crazy."
"Poor people are crazy Jack. I'm eccentric."
Now THAT is a good comeback. And Hopper isn't even playing a genius, just a disgruntled smartass who's into bombs.
And then there's "If man won't kill God, the devil will do it!"
Once again, what? That's a very random and seemingly baseless thing to say. What religion would he even be basing that notion on?
In Red Dawn the one dude is all, "If you have problems with foxes you call a hunter," or whatever the line is. Why? Because in a head to head showdown hunters always kill foxes. If I were one of Lex's men when he said the "devil" line I'd be inclined to say, "Uh Lex, doesn't the devil always get his ass handed to him by God?"
I get what they're going for, but right now it feels pretty inept. But who knows, maybe this new version of Lex is going to be comical because of his propensity for awkward sayings and it will just be a deliberate quirk they give to the character.