Does anyone have any advice: my 2 year old used to love his bath. And now he screams like a horror…

It’s a phase. Some children go through it. My first daughter did for a bit. I was able to get my daughter to snap out of it by offering those bath crayons that they can color with on the tile. It’s annoying to clean up but it worked. 🤷‍♀️ Or maybe you could try letting him pick out a new toy to play with only in the bathtub.