What hurt Reed the most was the sight of the bakery, his former home. He couldn't bear to look at her anymore around the hundred-thousandth loop. She was the opposite of everything he had come to love about her.
If he told her to sit, she'd sit for him. If he told her to stand, she'd stand for him. There wasn't anything she wouldn't do. He completely stripped her of everything that made her who she had once been.
What lay inside of the bakery was no longer the woman he had once loved. The mindless animal in his former home was but a shadow of a person. There was nothing for him there. Nothing to be gained from living with that puppet aside from misery.
So, Reed left. What point was there in clinging onto something that was already gone?