I'm tempted to start talking about Buffy here, but first I want to point out that the title and question are phrased in an ignorant and inflammatory way.
Let's start with "A fuse blew in your tiny little brain because you don't want to be Cinderella."
Sounds like you're trying to describe a psychotic break. People experiencing psychosis aren't "imagining" anything. They are experiencing a world different from the one you or I are experiencing, but it's not "made up". It is completely real to them. They are seeing, hearing, and remembering things as palpable and real to them as anything in your world is to you.
To say that it's made up is to suggest that they are willful participants in the experience when the truth is the total opposite.
The "tiny little brain" part insinuates that it is a failure or weakness. The fact is that some people are more prone to psychosis than others, but it can be induced in anybody one way or another (e.g. through sleep deprivation, torture, drugs, illness, and more). It is never due to weakness of mind or character.
"Sitting in a corner drooling" implies either a dissociative state or catatonic depression. Both completely involuntary. Both can potentially be induced as a trauma response. Such a person would be incapable of imagination. Some forms of depression, like the type severe enough to cause catatonia, can also induce psychosis on their own. Which, again, would mean they are not "imagining" anything at all.
As for calling a child a "dipshit" for "empowerment storytelling so [he doesn't] kill [himself]," well do I even need to address the heinousness of that statement? Children in dire situations commonly escape into fantasy as it's one of the few innate coping mechanisms a young brain is equipped with. In this scenario you concocted, you are mocking an abused child's attempt to suppress suicidal urges. Deplorable.
Sorry if I'm sounding combative or like too much of a downer, but the stigma against mental illness is pervasive and needs to be called out.
I've both worked and volunteered in inpatient mental healthcare, and my life was subsequently saved by outpatient mental healthcare. I'm sorry if I'm sounding harsh, but you need to understand the sheer number of destructive and inaccurate stereotypes you crammed into a single short post, because people who hear these types of statements end up repeating them, and some people who read and hear them end up suffering alone because they're afraid of facing cruel judgement by coming forward.
With all that out of the way, Buffy is a character out of your list that could be debated on legitimate grounds. There was an excellent (and quite sensitive, especially for its era) episode based on such a premise - that her entire time in Sunnydale had been a combination of hallucination and delusion. It depicted the struggle that someone undergoing treatment would experience as they try to separate what is real and what is not. Few TV shows have done as good a job portraying that empathetically.
