Have you seen his Suicide Squad movie? That is a movie that finds every opportunity to kill people in horrible ways, mostly at the hands of Squad members. I know, I know - they're not "heroes". But...yeesh. And his Guardians of the Galaxy movies enjoy at least one good brutal kill-fest per movie.
Yes, I have. And I watched his Peacemaker show. They're great. I don't have an issue with those. Because, importantly,
they're not superheroes. Peacemaker is, at best, an
anti-hero. I mean this is even called out in the show. The whole Suicide Squad are, at best,
anti-heroes. Literally imprisoned villains forced to work for the government as black ops agents. They are not good people. Loved the callback to the first issue of Suicide Squad in Gunn's version, btw.
However, Superman is a
superhero. Batman is a
superhero. It's when you can't tell the difference between Superman, Batman, and Peacemaker that I have a problem. Batman doesn't kill, but he does in the newer DC movies. Superman doesn't kill, but he does in the newer DC movies. That's what I'm talking about.
People with powers who kill is fine. Deadpool's awesome. The Boys is fine. Not my cuppa, but whatever. But that's a
subgenre that shouldn't be how the main superheroes are portrayed. When Superman is portrayed as an
anti-hero...you have the wrong person running the show. I mean, if you want anything like supporting "evidence" look at how much better the Marvel movies do and have done than the DC movies. Sure, you get that in the comics on occasion, but it's almost always in Elseworlds or one-off graphic novels.