>That's what Image Comics was (owned by Marvel)
Image comics was never owned by Marvel - it was founded when 7 of the big marvel/DC artists realized they didn't need marvel to publish them and left to do their own thing. Each artist had his own company (like Silvestri's Top Cow, Liefeld's Extreme Studios, Todd Mcfarlane's Todd Mcfarlane Productions, Jim Lee's Wildstorm, etc). Image's job was to act as a publisher that took minimal financial value from the project away from the creators, and didn't own any of the IP.
DC comics did have some smaller publishing houses - Vertigo comics, Wildstorm Comics after they bought it from Jim Lee, etc. Vertigo owned IP so it wasn't creator owned stuff, and I think Wildstorm was a mix. Vertigo imploded after a woke reboot that lasted from 2018-2019, and DC consolidated its adult oriented lines to DC Black Label.
Marvel had Icon Comics with creator owned stuff like Kick Ass (that later got a movie) but it was really about stopping Brian Michael Bendis and Mark Millar (netflix acquired Millarworld Limited in 2017) from shopping those IPs out to other places.
>good literature isn't supposed
99.99% of comic book writers today don't know how to write good comics, let alone good literature. DC has imploded and gone through multiple rounds of layoffs and there are very few of the people who were involved with the comics you remember left there anymore. Marvel is happy to make garbage if it hires people with the right diversity checkboxes (see Vita Ayala, who somehow keeps getting more work while being completely unable to write stories people want to read).
>V for Vendetta
Originally published in the UK, later put out by Vertigo Comics (DC) in its hayday. But Alan Moore is better writer than almost everyone left at either of the big comics houses these days, and he was writing in a time where it was less culturally acceptable to write blunt propaganda into comic books.
>Again, from the 80's /sigh ... it was a freer time, when risks could be taken
This is because our society has switched. In the 80s the left was fighting right wing christian censorship and largely winning. Today we have inverted.