We all have monsters inside of us, and we all have an inner child in us. You always think about your inner child as being the sweet and innocent part of yourself, but it's also the part that's all ego with the mentality of, "If the world isn't pleasing me, it isn't doing its job.
You can imagine an already unstable mind that's completely entitled and has been given anything they wanted, throughout their whole life, and lived in a bubble with a domineering, in a very quietly manipulating way, mother, that child mentality never gets a chance to mature and discover its own limitations. It just runs rampant.
Sometimes you're watching a great film actor, and if you stand 10 feet away from them, you're like, "God, they're terrible. They're not doing anything." And then you see the close-up and it's so nuanced and so much expression is happening. They were acting for that camera and for no one else.