Why do we do this to ourselves?

[GUT]

Peter Sutcliffe, a 'mr nobody' in his local community had a self-aggrandising note that was found in the cab of his truck, didn't he?

'IN THIS TRUCK IS A MAN WHOSE LATENT GENIUS IF UNLEASHED WOULD ROCK THE NATION, WHOSE DYNAMIC ENERGY WOULD OVERPOWER THOSE AROUND HIM: BETTER LET HIM SLEEP.

It must be incredibly frustrating to be a serial killer and not be able to tell others how very clever you are!

Yes but one of the least self confident people I have ever come across would write out 100s of times a day

[name] is clever
{name] is smart
[name] is successful
[name] is confident
[name] is dynamic

and other such garbage and he was none of those things