You just can't forget that even though your parents don't love each other, this is a kind of divorce where they can still cooperate to make you happy. They might even tough it out a little bit and become awkward friends.
They still love you, and both of them will do whatever they can to make you happy. They will probably have seperate homes and you might have to go around a bit in a schedule, but nothing much will change except one parent figure not being around a lot. Just show them that you love them both, and be very understanding, because this is very hard for them as it is hard for you, and being a thorn in their side isn't going to help anything.
I am not saying this is going to be easy, but you have to fight through it, because in a reality where they stay together will go about ending up in an even worse relationship.
parents don't need to be divorcing while they still have their child living with them
You are wrong and need to get out.