Kaioshabysyaiea.
Hell, as the Humans call it is a dimension of its own and it is said to be the motherland to all creatures of negativity unlike the dogma, demons don't rule hell infact we can be said to be at the mid/bottom of the food chain.
The preconception of us being the owners of hell is probably because we are the strongest creatures to have been sent out from hell, they us demons because they haven't seen true horror, deep in hell are beings that will make their god piss himself if he could survive to do so and not die from mere shock.
I won't talk about those abomination as even though I'm no longer in hell I believe they may be able to detect any acrimony towards them, I shudder at the thought of even one of their pets coming after me.
Hell is a big place and there are no squabble for territories.
I was an independent demon prince and my fief was huge but fuck all that. Concepts like cities and human technologies don't exist not because we are uncivilized and backwards but because we are beyond that humans rely on the techs because they are physically flawed and have limitations we on the other hand are supernatural, the name speaks for it self.
Name anything technology helps at we can do it innately, calls - we have an innate telepathic linker and receptor
And I'm not going to elaborate on our abilities you already get the gist.
Hell is an amazing place for a dark creature and it's diversity makes it so interesting that you wouldn't want to leave but don't get the picture of a wishy washy fairytale world no it's a brutal place where even the mighty can fall and I'm a perfect example of that.