In perusing the first chapter, I have some ideas on why a publisher might not take to this story. Please accept these thoughts as criticism from a publishing perspective, rather than artistic.
Read the story now
First of all, there are a lot of unnecessarily big words, right off the bat. As an Anne McCaffrey fan, I have no issue with using your vocabulary and challenging readers to extend theirs but when you are just beginning to build the bond with a reader, this can feel a lot like a boast of the author's intelligence or that you are looking down upon them. We have to remember that readers may not have the same relationship with the English language that we do as writers and that being kind to them, especially in the opening moments that will determine their desire to continue reading or not, is essential. Publishers are only interested in whether or not a story will sell. They don't care about your artistic integrity.
(Note: I am probably guilty of this to an extent, myself so I apologize if this feedback seems hypocritical.)
That brings me to the second point. The formatting is unusual and while I understand your reasons and the artistic choice, it's too sudden and breaks a reader's concentration right from the beginning.
I feel like the first chapter could use some easing into before waxing poetic and then messing with formatting before dropping a miscarriage on the reader. Again, these might be deliberate choices but a publisher will look at how this makes a reader feel and if they will want to buy the book or not. These kinds of philosophical challenges are more suited to poetry than to engaging people in a story which has a long way yet to go.
One last note:
“Your mom and I, we made this deal, see. She was about to lose you, and she cried out for help from anyone who might be listening. Lucifer didn't see any way to benefit from it, selfish bastard. What most humans call God...I'll explain later...wasn't interested in you at all, being as you would've been recycled and reborn as someone else, so I stepped in after consulting with...um...Him.”
This kind of block exposition is great for a TV series like Supernatural but in a book you want to spread it out and give people time to chew over ideas. There are better ways to establish the callousness of a character than to drop world-setting bombs on your audience all at once.
Basically, I think this story could have potential for a younger audience so you might consider toning down the language and vocab a little if your goal is to get a publisher on board. Think about the first impression you need to make rather than the one you want to make. You can play with your writing further into the story if you feel it lacks unique style.
That said, this is your story and if you simply can't adapt such elements of it, then self-publishing is always an option. Just remember, a publisher is concerned with a product, not a work of art.