I'm admittedly a dissenting voice in this area of casting Lex, but I don't "hate" Lex Zuckerberg, that's too strong a word for me to use. I definitely don't like him, and to this day, I disagree with the casting and portrayal.

Mainly, what really irks me the most about Jesse Eisenberg's portrayal of Lex is that the personality he injects into BvS (to me, at least) is absolutely nothing close to being the solidified, hardened criminal mastermind that fans have come to know and love. It misses that mark entirely and by so many miles. It makes me shudder to think of this version of Lex doing anything that other media has had him doing.

I know I'm not the first to say, but one of the reasons I've liked the character of Lex so much is that, as far as villains go, he is a total pimp in other media: he's an off-the-charts genius, a self-made billionaire, he's in peak physical (and mental) condition, and his reasons for his dislike/hate for Superman are so complex (not just simple jealousy or some other pigeonhole). He's so driven and motivated to be the full embodiment of humanity's cumulative strengths.

The BvS version of Lex Luthor is a starkly high contrast to that: some lanky trust fund snot-nosed little punk with a slim (at best) build. I'll grant him a genius IQ and even fame and fortune, but he certainly doesn't come off as the same type of self-made man who has truly earned all of his fortune (what he's built from where daddy left off, anyway). His demeanor is like that of a cavalier teenager who doesn't fully understand the consequences of his actions, like a college kid who is milking away the fortune his parents set up for him (even moreso here, he's acting the same way with government privilege, access, and funding).

I mean, how the hell is this film version of Lex supposed to physically go head-to-head against a meta-human like Supes, even IF Snyder decides to put him in the famous Warsuit? I certainly don't see that feasibly happening, not on a level that would make me believe it to be a fair fight.

Now the argument can probably be made that we're currently at a point in the DCEU timeline where that metamorphosis probably still has yet to occur (much like Anakin Skywalker becoming the formidable, badass Episode IV version of Darth Vader in Star Wars). But if that's true, in all honesty, all of that should have ALREADY happened WAY before these events between Batman (especially when he's BEEN Bats for years now) and (definitely) Superman have occurred.

Now I still haven't seen the Extended Cut of BvS, so maybe my opinion might change (I doubt it) after. But as I know it now, having Eisenberg as Lex just seems like a massive failure (I actually agree more with casting him as The Riddler, as was originally intended).