Thank you, my lovely ladyThere is a lot in there that is how I see Lex's backstory too, and I really enjoyed reading that (a lot of the time I just skim through stuff like that, but you actually drew me in)
But honestly, I don't want them to show his backstory that thoroughly.
We have plenty of villains with fleshed out and sympathetic backstories. We may even see that with Zod. I wanna see more villains like The Joker, whose actions NOW are relevant to the hero, and whose backstory can just be alluded too.
In a similar way to how they handled James Bond in Skyfall, it'd be okay to hint at what his childhood was like, but you don't spend entire scenes doing flashbacks.
So you could have a moment like Lex hearing about something happening down in suicide slums and one of his employees casually saying 'Hey, isn't that right by where you grew up' and then him glaring at him in a deadly way that says 'You ever mention where I came from again and i'll kill you' and then have the guy just sort of cower under his silent threat.
And then later you could have a scene where Superman is angrily confronting Lex about what his actions and contributions towards crime are doing to people on a street level, assuming that he's always been rich and just doesn't know what it's like for the people he hurts. And have him reveal to him that he knows plenty about what it's like on the bottom of the ladder, and he just chose to make sure he put all the efforts of his life into making sure he was the one on top.
I guess kind of like the Bruce/Falcone confrontation in BB in the sense that it's about opening the heroes eyes to where this corrupt man is coming from, where his power lies (because I think the suggestion there was that he only had power BECAUSE of his understanding of that kind of life) and why there is no reasoning with them.
I think subtly alluding to the fact that Lex is more than meets the eye, but still allowing him to just be a cold and evil ruthless villain rather than a sympathetic one, is a much better way to go.

I agree with you absolutely. See when you write somebody as complicated as Lex, you need to establish who he is and where he came from.
It helps you get a better perspective on how to write the character. I'm sure Nolan did with the Joker, then as you said, threw it away to keep things as you described them. Just alluding to things.
Besides, I was bored as well, just reading up Lex's history and all that
