Marvel is known for setting many trends in superhero comics, but they are just as good as following them. In the mid-70s, anti-heroes were all the rage and Marvel followed suit. The publisher created iconic anti-heroes like Wolverine and Punisher, which were the first of many who debuted in the '80s, '90s, and beyond.
Source:https://www.cbr.com/marvel-anti-heroes-better-villains-venom/