Nails on a chalkboard - The worst sound you can imagine while someone is yelling at

The worst sound you can imagine while someone is yelling at you for failing a test.

My mom’s scream when I spilled my cereal was like nails on a chalkboard but with a cereal crunch.

My friend’s voice when he failed the math test was like nails on a chalkboard but with extra math hate.

My dad’s shouting when I lost his keys was like nails on a chalkboard but with a key-shaped pain.