They would eventually fail since they were immortal, they were not God, and they have to live in the garden forever! One possible sin, how long they could possibly resist it? This make the act putting the tree in garden as an evil act since it brings suffering with no use. The story is then false if we accept that God is good and can only do good.
I think you have to meditate further on the story.
Satan was given the one attempt.
Now we happily(?) go on sinning of our own accord without encouragement.
Then, we were in a state of grace where we had more control and, being closer to God, would be unable to consider sinning: not quite heaven where the goodness makes sin impossible, but definitely not where we are now in our broken state.
You understand putting the tree in the garden as an evil act. It would have, if we had chosen God, permitted us to grow more deeply in our understanding and love of God.
Again, the chain of events culminated in the birth, death and resurrection of our Saviour, demonstrating the infinite depth of God’s love for us.
We all suffer; at any point some more than others. In many (most) cases, we find solace in Him.
I am interested; how do you understand suffering? It is so real, and when severe, it cannot be intellectualized away. It is there reaching to the core of our existence. One can seek Nirvana, but it is a very rare accomplishment. Christians have the transcendent symbol if the cross with its ultimate conclusion, the resurrection. Through our pain we have the possibility of connecting with God, who knows and shares in our suffering making us new.
There is a very real answer to pain.
To me your comment suggests that it was evil to create us. This is all pretty amazing!!! So, I wouldn’t agree.