Why do you think mankind is not depraved when all of us have sinned and fallen short of the glory of the Lord as each one of us have been born with the sin nature from the beginning starting with Adam and Eve who were the first to be deceived by Satan. Who is it that tempts us and is our great adversary that works through others of unbelief.
I think mankind is totally depraved, but you missed the point entirely. Mankind is totally depraved because of the presence of the tempter, the devil, within the brain of everyone
So, now let's look at this question again, shall we?
Who is totally depraved? Mankind, or THE DEVIL?
Pardon me for putting the answer in capital letters.
There is little point in leaving out the obvious culprit, unless of course the person themselves is blinded to the fact of that culprit.
I could approach this also in this way. Israel is shown to be God's children in many citings of the Old Testament, and by Jesus in the New Testament. Deut. 14:1, Psalm 82:6, and Matt. 23:9 for examples.
Even Adam was termed God's son in Luke 3:38
Do you really want to say God has totally depraved children, while simultaneously overlooking the presence of the enemy, the devil, the deceiver, the tempter, within them?
I'd think not. But hey, if you've bought into that line for awhile and missed the obvious, it may take time to unwind this in your own mind
It hit me one day, quite a few decades ago now, that when I read Mark 4:15 after I was saved mind you, that I always seemed to have this voice that came into my head that said, "This doesn't happen to you because you're a believer" and then, hey, wait a minute!
Yeah, unfortunately, a little liar had crept into the picture, and that actually showed me the present day reality of these matters. And yes, it did change the way I saw things, starting with my own self, which, cough, cough, really isn't
That day I also learned how to comply with Luke 14:26. It was clear as a Bell