after St. Louis police unions instructed officers to publicly display The Punisher's insignia (the mark of a lawless, fascist murderer) the comic book community was quick to point out the stupidity, and the frankly horrifying message sent by supposed peace officers endorsing a maniac. So it's a good thing The Punisher personally confirms he hates cops who see him as a friend… making every cop who "wears his mark" or calls themselves a "fan" look like shameful fool in the process.
-- Andrew Dyce, The Punisher Confirms: He HATES Cops Who Support Him
I do remember this one future one-off comic where he killed a bunch of rich pricks and politicians who even had a small repopulation program going, because they were the ones responsible for armageddon.
Rather than let them live and continue humanity, he killed them all for the crime of destroying it. Then he walked into the fire, ending his own life.
I'm not a big comic guy but I thought then and now that that was the perfect punisher story.
He did the only thing he knew how to do, to kill. a thing that definitely helped no one except for himself, then with no one else to punish he burned literally in the fire he was consumed with all his life.
That's poetry.
Sounds like The Punisher: The End which starts with him in NY State Prison for his vigilantism when nuclear war breaks out.