I believe that the reason Satan hates man is directly related to the same reason he and a third of the angelic host rebelled against God.
So I think the better question to ask is “Why did Satan rebel against God, AND... HOW did he convince a third of the angels to join him???
The bible says that iniquity was found in him... clearly, pride was the core issue... but we don’t really hear much about the details of that pride, or the objectives of his rebellion.
Consider for a moment the fact that angels were NOT created in the image of God... and yet they are far more powerful than man. I think that God revealed His plans to create man, and detailed out to the angelic host what THEIR role would be in serving mankind... guarding mankind... and that eventually, their position or status in heaven would be in a way LESS than that of man. (primarily because man is made in God’s image)
Therefore, I think that the reason Satan hates man is not just pride, but more specifically JEALOUSY... and this is how he was able to convince a third of the angels to join him.
I would add that the jealousy is in part due to the fact taht humans can reproduce our selves in the image of God as well.