Imho I don't think it has anything to do with the bloke being a millenial (I am too for a matter of fact). This sheerly sounds like a narcissist and those spread out through all generations. The fact that he wants to sue the mechanic, also learns you that this guy will never learn from his own mistakes, ever, and is an absolute pain in the ass to the entire world's society. Justice got served costly with his diff blowing up. That's the good part of the story.