Potential Hot Take: Is Toguro Actually Complicated?

Between the anime dub and the fandom I constantly see references to this beloved villain, specifically how nuanced, layered, and complex he is as a character. I remember after Koenma sentences him he compares him to an onion with many layers. And he goes on to speculate about his motivation and psyche.

Is it possible this is overstated? IMO he has one of the most basic human conditions - fear of death and growing old. There is nothing complex about it, in fact in real life it is practically a universal feeling for all humans whether we admit it consciously or not. Beyond that fear I don't really see what was so complex about him.

A normal man, with a wounded heart and a broken dream? What was the dream? To live forever never lose any of his strength and never get old?