You didn't address these questions and comments: First, the serpent was described as the most cunning of all the wild creatures God had made then later he is cursed above all the livestock. If the serpent in the garden was not actually an animal then why does the text keep mentioning animals? Also, if he was not an animal, why curse him above all the animals? What did the animals have to do with any of this and does this mean the animals were cursed?
To hear many Christians tell it, Satan's fall from grace happened before the events in the garden. So why did God wait until he tempted Eve to curse him?
Satan [Gen 3v14] was now considered lower than an animal because now dust he would eat. No one can eat dust and live. That was showing Satan's death sentence [Eze. 18vs4,20]
Remember the elevated position of the serpent on Moses' pole ?
That serpent was not Satan. Did not mean any 'serpent' in Eden.
So, then we need to know at what point was Satan's 'fall from grace' ?
Satan apparently had the heavenly assignment to be in the garden of Eden.
Satan, as an invisible heavenly cherub [angel],
according to the account at Eze. [28vs14,16],
had a God-given purpose to be there in the garden realm.
Please notice he is referred to as a 'covering cherub'.
He was assigned as we might say an 'overseer of the couple in the garden'.
He was supposed to be there as a covering protection safeguarding them.
[perhaps the coining of the term 'guardian angel' stems from that]
Please also notice his angelic state as described in verse 15.
Satan starts out [with that heavenly assignment] with angelic perfection.
The explanation given in verse 17 was that he became haughty because he thought so much of his own beauty. [James 1v14]
So, from that beginning of Satan's wrong way starting on earth, did he now become [make himself] into a Satan and a Devil which are titles for resister and slanderer.
Sometimes in the work force a person might let their job position 'go to one's head', so to speak. Satan's appointed position [covering overseer] could have allowed him to place undo importance to that position to the point that he greedily wanted the humans [us] to worship him instead of our Creator.
-[Eze 28v2]
So, instead of an angelic protector, Satan [in his invisible earthly assignment] became their [and our] terror.
-[Eze 28v19]
So, God could not have cursed him before he sinned but afterwards.