That’s a good question.
Our society is clearly messed up. It can be sick enough to think that promiscuity is normal, debauchery is freedom, and that homosexuality is love. It can be twisted enough to call killing the elderly “dignity” and butchering infants in utero “choice”. Morally, things look pretty bad.
That’s what the dictionary definition of “depraved” is. It means “very morally bad”.