If I wanted Punisher, I would just read Punisher.
There's no good reason to turn Bruce Wayne into a completely different character. One of the more interesting parts of Bruce to me is the moral restraint that he has, despite his intimidating and dark appearance suggesting otherwise. People that want this Punisher-esque Batman are just edgy fags that want everything to be presented as grimdark and immoral.
Make a new character if you need to, but I want to read Batman, not bootleg Punisher.