Need advice for my brother please

Hi, I’m looking for some guidance. I’m a 25-year-old woman with a 19-year-old brother, and I’ve been placed in a parental role toward him by my parents. Even though I’m neither married nor a parent, it often feels like I’m already raising a child. This has been going on for years, and I’m completely worn out. My parents hold me accountable for my brother’s behavior, despite the fact that he is legally an adult. He doesn’t listen to me, and it’s frustrating because I’m his sister, not his parent. In addition to this, I handle all of the household responsibilities—washing dishes, sweeping and mopping the floors, and doing the laundry. Meanwhile, my brother spends his days sleeping, eating, playing games, and coming home late at night. He shows little to no understanding of responsibility, and it leaves me feeling overwhelmed. I feel emotionally drained by my parents’ actions. They avoid taking responsibility for guiding or disciplining their own son and seem unaware of how much this situation affects me. I’ve even had to take medication for anxiety, but honestly, it only provides temporary relief and doesn’t solve the underlying problem. I really need advice. 🙏🥲