Genesis 2:16,17:
"And Jehovah God also laid this command upon the man: 'From every tree of the garden you may eat to satisfaction. But as for the tree of the knowledge of good and bad you must not eat from it, for in the day you eat from it you will positively die."
At least in the case of Adam, he was clearly warned prior to the serpent's invitation, and so he had almost EVERY reason NOT to eat it. He knew at least some thing of what's good and bad.
And then the serpent comes along and tells the woman, not the man who was warned directly from God about the tree, that even if she eats the fruit she would "positively NOT die." Genesis 3:4 (Which is no cause for gender discrimination, if I might add)
Problem with giving second chance is, after the eating thing, there's a whole series of fingerpointing.
Adam indirectly blames God for giving Eve, who was the reason why he ate the fruit. "...And the man went on to say: 'The woman whom you gave to be with me...'"
Eve indirectly blames God for creating the serpent, who was the reason why she ate the fruit. "...To this the woman replied: 'The serpent--it deceived me and so I ate.'"
Thus God is blamed for both creating humans and for creating living organisms.
As for why there was even a tree of knowledge of good and bad... Personally, it's one of the mute points since the Bible doesn't mention why.
Anywho, at least Adam knew clearly that it was wrong to eat the fruit, and why. So he voluntarily(perhaps reluctantly, but who knows?) chose some other authority than God's, with the emphasis on the fact that he(and Eve) didn't ask God's permission or thought on the matter first.
And keep in mind that God actually even walked about back then: "Later they heard the voice of Jehovah God walking in the garden about the breezy part of the day..." (Genesis 3:
They had no excuse to ask God when he's so near and available for couseling.
Well, I see God giving humans a chance to prove themselves right in being able to rule themselves without problems as giving a second chance. If that's not what you're expecting, sorry.
If there are humans that decide instead that being under rulership of God is better than under humans, they will be taken under his protection when resurrected; those that remain rejecting that authority will be left to their own ruins. I see that as perfectly fair. (Why should people still receive benefits from an authority they push away?)
Besides, you mentioned "mindless slave". Adam and Eve, along with the angels, were given freedom of will, just that there are consequences for particular actions.
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Genesis 1:1 "In the beginning God created the heavens and the earth."
So heaven did exist.
Genesis 1:26 "And God went on to say: 'Let us make man...'"
So God wasn't alone... at least by the time he started on creating humans, and had the assistance of others.
Jesus, if you accept that he lived in heaven before he came to earth, is also known as the Son of God, would be the first ones that helped God in the creation.
The name "Satan" was only given to the fallen angel AFTER he fell, not before when he was still in heaven, evidenced by Jesus' words: "he did not stand fast in the truth." (John 8:44) Since he clearly existed by the time Eve was created, I would assume he even had a hand in creating humans, he saw how God had attention, he wanted that attention, and desired it all. That desire drove him to trick Eve into going against God's authority, and led both Adam and Eve into a certain death, making Satan a "manslayer".
