So pissed at my sister

I want to scream at her for being a lazy mom. She's too lazy to find a new daycare provider even tho the one she has has shown obvious neglect. Not maliciously, but she's always got her back turned and lets my nephew get into everything. Her house is always trashed, my nephew has came home with sunburn, bad diaper rashes, and most recently, he burned his hand on her hot oven door that her son opened while she was in the bathroom. One minute my sister is looking for a new option then stops cuz she wants to save a few hundred bucks a year and stay out of a contract cuz my mom will watch him during her breaks from teaching. It's infuriating to me. What's next? Drowning in the toilet? She's a single mom, receives zero child support, and lives with our parents, so I understand wanting to save a few bucks, but not at the expense of your childs safety. Christ on a bike 🤦🏼‍♀️