>>112121590Dexter and Mandark were hired by some faceless corporation as research scientists but Mandark was useless and couldn't fome up with anything. So he stole Dexter's ideas and used them to climb up the corporate ladder to become ceo of the company and turn it into some big brother type company that ruled over every aspect of its employees lives. Mamdark then proceeded to torture and abuse Dexter, even taking away his name his name, for every little thing until he broke Dexter's will and turned him into a sniveling wimp who forgot he was a genius.
Before that it was implied Dexter was a confident and self assured guy as a young adult.