Nobody tells you that all babies are not created equal. Some will literally suck the life out of you when you already don't have much life to give. A baby that incessantly cries is not the same as one that sleeps and smiles and coos.
That is what this movie is about. The underlying questioning of yourself and your abilities. The feeling that you are losing yourself, your sanity and that nothing is going to be the same again. That everyone else has it together while you are drowning.
This movie was so triggering because it captured every one of those feelings. It was hard to watch for these reasons, but also a brilliant idea for a horror film...