Hermione felt ashamed even though it wasn't her fault that she drank another potion. Kingsley had seen her at her absolute worst. Everything that Fenrir had done for her since she showed up on his doorstep had also been done by Kingsley and for much longer. It seemed like such a weakness to blame her current condition on another person. When she'd been using potions on a regular basis, it had always been her decision to start using them. Rabastan might have dangled them in front of her face, but she was the one who chose to pour them down her throat. She was also the one that made the decision to keep seeking them out.