Answer
A term like total depravity is an easy one to misunderstand because it could make us think, well, if humans are totally depraved, then people are guaranteed to act as bad as they can possibly act. But that's not the point about total depravity. Total depravity is not about how bad people will act, but it's about the extent to which sin affects us as human beings. So, total depravity means that there is no part of us as humans that's untouched by sin.