system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel and DC] From a storytelling standpoint, why doesn't Hell have a single supreme ruler?

Not counting Vertigo for the latter universe.
gpt
Marvel: The throne of Hell is perfectly open for any demon lord or archdevil who wants to plop their ass in it. The only problem is that their countless colleagues would surely contest it, strenuously; that might just be the one act that could get all your rivals to agree on something and kick you back off. Then there's the even worse possibility: that sitting on the Throne of Hell would catch the attention of whoever it is that rightfully ought to be there. Nobody knows exactly who the "real" Satan is- he could even be one of the demons we've already met, trying to bait his less loyal underlings out- but catching his attention that way seems like it could be a Really Bad Idea. 

DC: Lucifer got sick of ruling Hell and left to become a nightclub singer. His two co-triumvirs, Azazel and Beelzebub, immediately started fighting over scraps. (Yeah, yeah, you said no Vertigo, but this honestly is the answer)