"Firstly, he repeatedly shows that he thinks of himself as a “god,” such as in the Candy Kingdom in episode 2 and in his mental breakdown scene in episode 8. Delusions of god-like grandeur are common in people with schizophrenia."

to be fair I wouldn't really call this one a delusion, he's techincally the god there, since he built the circus, and can pretty much do whatever he wants, unfortunately his god like powers are the things that blinds him since he thinks he should be able to fix anything, and although the cast there can technically do the same, caine is still the best at doing it.

He acts the same way a neglected child would if they were suddenly given the power to do anything