FAILED EXPERIMENT?

Is the earth and all its inhabitants God's great failed experiment?

If you are among those who believe that the essence of the gospel is 

•     Adam and Eve sinned and
•     Therefore, YOU are a sinner, too, and
•     You need to repent and believe in Jesus 
•     So that God will impute His righteousness to you and dismiss all your sins
•     So that when you die, He can whisk you away to your forever home in Heaven while the earth is wiped out of existence ...

Then what do you make of God's original plan - the one where He creates a material existence in which He would share space with material/spiritual beings fashioned in His image?

Did God's wondrous work - so celebrated in Genesis chapter 1 - turn out to be the mother of all failed experiments? 

I guess it just didn't work out the way God had hoped.