As anyone who has read "Warped Time Wish" would likely notice, it's a bit darker than my usual fare. Readers would do well to brace themselves for the sheer level of the protagonist's narcissism and possible God complex (well, to be fair, he has literally become convinced that he is some kind of deity). He also very much believes that even his pranks serve a greater good or noble cause. The ends really do justify the means in his view.
Just think of him as the more purely Id version of several of my other characters, most of whom have more scruples of some kind and more empathy as well as conscience. Early on, the MC wonders if he might be a sociopath. I prefer to leave the answer to the reader while keeping my own judgment of such things close to my vest.
That being said, he is a young man with obvious anger issues and could use a good therapist/counselor. He just happens to be an angry youth with godlike powers, a nightmare scenario for many adults and even some other youths. Just be aware, he's not likely to seek THAT kind of therapy. He's just going to keep venting his spleen by unleashing his wrath upon others.