"He is a regular guy that goes out at night and exacts vengence on wrongdoers."
I'm sorry 🙁, but it was the latter part of your post that made more sense. Batman is as irregular a guy you can find and in no way relatable to.
It would be nice though. It would be nice if we could all be super genius eccentric billionaires who mastered all forms of martial arts.
Batman was fun when he was in Gotham. Now he's just a guy with poorly written upgrades so he can hang with Superman and the rest of the Justice League on a cosmic level where he really has no business being. Compare what Batman had when he started to what he has now, it's ridiculous. The charm was the Batman was human, and he's not even that anymore.
Compare him to say Cyclops or Nightcrawler of the X-men for example, they pretty much stayed the same for 40 years 😛.