The Penguin
Anyway, a really good example (and up until now one of the few actually good examples in this subgenre) of how to focus on a villain's POV. No trying to humanize him too much in order to make him "be relatable or else people are not gonna empathize with the bad guy, plainly bad guys are unrealistic!" or any of this bullshit. It's funny how Matt Reeves's Batverse, while also being realistic, isn't afraid of showing how rotten to the core a person can be without any good reason. That's because those kinds of people are quite real, and we, trying to preserve what remains of our innocence, try to delude ourselves into thinking no one can be that evil without "a dark and sad past". Therefore, I believe that trying to make every villain this "relatable anti-hero" who can turn good if you use the Talk No Jutsu is actually not realistic, but even more childish than a cartoonish super villain.
That's not saying there are no nuances on the Penguin. His villainy and twisted psyche have layers upon layers (even Freudian ones), a not so carefully woven web of lies and egolatry, a web mostly woven by impulse and instantaneous rage. The "relatable villain" trope, on the other hand, is actually smartly used with the antagonist, Sofia Falcone (or Gigante). But she doesn't meet a benevolent hero who tries to listen to her. She, instead, meets the filthiest scumbag and borderline psycho she could've met in mafia, a naturally born monster, which makes her go deeper in her path to villainhood.
Sometimes I wish this series wasn't made in the era of "compact TV", where every show needs to have just enough episodes to cover the main story, and could have more episodes just to explore more of this mafia world and all the crime families, but for what it is, it's an outstanding supervillain TV show