I once read a book that was all prologue.
No, hear me out on this.
It was supposed to be a fantasy book right? And the summary/synopsis was something like: Whatshername is the last of the black fairies or some shit and now she's found out her past and is on her way to defeat the gods.
I was like, okay, sure, let's see what's the deal.
And then the first chapter was like: everything started when the goddess created the universe and bla bla.bla fairies were chaos creatures bla bla the gods did not like, bla bla unrest.
And I was like...okay?
And then the second chapter was like: only Anna hatawsy queen of the fae rised up to the challenge and bla bla bla fell in love with dark god, bla bla bla forbidden love, bl bla bla but how will their love prevail?
And from then on, like legit the first 10 chapters were prologue until the eventual part where finally, we got to the scene the summary was speaking about. I was like: well that was absolutely horrid, let's see what comes next.
I got like, one chapter of half assed plot, by which I mean nothing fantasy like, more like: I'm Whatshername last dark fairy and I'm in love with Bob the coolest guy but he's never realized I exist and my dad is lame, I know I'm destined for greatness.
And then Anna hatawsy queen fairy appears to tell her her Destiny and then we have like 5 fukcin chapters of magical theory and more god background bullshit and at this point I left a respectful comment saying something like: hey! You have an interesting concept, but it's getting drowned by all this exposition, and most of it is not really relevant to the story. It may be better to just, spread it around the story in a more natural manner.
And the author replied: no one will understand the story otherwise! Like bitch, there's no fukcin story to understand it's all prologue
Anyway, where am I going with this? This may be a bit harsh and I apologise if I offend anyone with this statement. But if you can't spread the exposition around the story naturally, you may not be ready to tell this story.
What people sometimes tend to overlook is that the reader can be shallow at times and pay small attention to details, but they're not dumb. The reader likes to find out more and more details about your world, put together the pieces, they want to find out what happened in the angel/demon war and why is it so important to this story. Letting some questions unanswered for a while can be a great way to make the reader yearn to know more. And feeding us bits and pieces of your background and world building as the story progresses makes a reader more invested in your story.
If I read your exposition prologue, like, great, you may get an A+ on your world building, but I may completely loose the interest in it. Like, yes now I know why the faes and the gods hate each other but do I care? Do I have an emotional investment on it? Am I intrigued? No, all I am is bored and about to sleep. However, if we stablish that the fae and gods hate each other due to some horrible thing that happened ages ago, I want to know what the horrible thing is! How is it related to the main character? TELL ME.
So that's my point of view. Writing is not only about making a good story, it's about telling the story in a way that makes people want to know more.