1. He used surrogates for most of his schemes and easily killed them in order to keep them from ratting him out. Along with using bribes, the best lawyers he could hire, and blackmail.
That would work in the 90s, but not today. The feds would have enough surveillance to know that Lex hired those surrogates, or blackmailed people, and once they have the proof, they'll seize his bank accounts, leaving him with nothing to pay his lawyers or bribe people with.
2. The few times he DID get caught doing evil, Lex used a renegade scientist famous for creating clones as a scapegoat claiming he kidnapped him and replaced him with a clone, which was how JOSS got rid of the whole "Lex cosplaying as his own son" storyline and later, Lex trying to kill Superman when he was President.
Again, that would work in the 90s, but not in the modern day where the Feds would know Lex hired that scientist.
Oh, and the fact that people are stupid enough to make him president means they deserve Darkseid's boot on their throats.
3. Finally, Lex is so smart and will occasionally work with the heroes, to save the earth that Lex manages to finagle government pardons as a get out of jail free card.
Realistically, the best case scenario will have him become a well-paid government employee that the Feds can keep an eye on. Worst case scenario, they indenture his ass and whip him out when needed.
A lot of this evil corporate shit worked in the 90s when times were loose and the corpos didn't have a surveillance state watching them. Nowadays, someone like corporate Lex would wind up like a Russian oligarch whose wealth got seized, or he'd get waterboarded in Gitmo or put down by Seal Team Six.
Which makes Vought in both the show and the comics retardedly unrealistic. Especially the show, where they make it clear that real-world politics applies to the world. After the Compound V reveal got through, the Feds would've nationalized Vought, seized Vought tower, and kept the formula for V under their own lock and key while Stan Edgar would get dragooned off his post by a federal pencil-pusher. Who in this case, would probably be Mallory.
Aw shit, hold onto your bollocks, cunts (not in a misogynistic way)
If the show had the balls to be edgy, it would be misogynistic, since a lot of edgy shit back in the 2000s wasn't afraid of sex, rape, women who get tied down or look like strippers, and all the stuff that feminists today despise.