If you’re a parent who loves being a parent (I am and I do), then you know the joys of raising smaller versions of yourself.
The point is, by their very nature, little kids are narcissists.
Which is why there are so many horror movies with horrible kids; little deadly darlings being supernaturally awful and engaging in all manner of transgression.
The good news is, those almost sociopathic traits wind down fairly quickly post-toddler stage.