I do not believe anything was botched... I think while the set up might have been to grab Stevens... The real operation was all those weapons.
We were shown all sorts of images and stories of how the very men who stormed the compound rushed the ambassador to the hospital.
Did they do the same for the computer tech they killed in the initial attack?
No.
So why would you rush someone to the hospital when you just stormed a compound using overwhelming lethal force?
Because you wanted him alive.