If we're strictly talking Marvel and DC, I think they're pretty abysmal. They're not interested in good storylines or characters. They just want the ability to print comics in perpetuity. That's great for them, bad for fans.
I grew up on that style of comics, but as soon as I discovered and could get access to manga regularly, I never looked back. I absolutely hated the cyclical nature of storylines in superhero comics, where responsibilities pass from one creative team to the next, each team stepping into the shoes of all the people before them and the chain of decisions that led the characters where they are now. Nothing ever matters. And when it seems like it will matter? Naaaah reset the universe! (DC in particular has hit that button ~4-5 times just in the past 30 years.) The publisher doctrine for the kinds of stories they let their writers tell and how consequential those stories can be are massive hindrances to good storytelling. And any successes over time can only truly be called workarounds.