>>211561908he was just a regular teenager that liked to think he was smarter than everyone else. thats part of the appeal and tradgey of the series.
You give a regular, well meaning person ultimate power and watch them destroy themselves.
its questionable whether or not the shikigami were also fucking with his mind the whole time. The problem with this series is, once itbecame popular the government basically freaked out and theres lots of rumors that the author was forced to change his story and make light retarded/comically evil because the japanese government didnt want to deal withcopy cat vigilantes murdering people who deserved to be killed.