How could he? You came back from the dead once, you went through too much. Bruce said he could help you, even after he was the one to blame for your death.

"It's for your own safety."

Bruce said, and you felt the fear consuming your body, the effects of the failsafe he made. All of your adrenaline became pure fear, because Bruce doesn't want you killing again.

"You can have a new life, you don't need to fight again."