Pre school scared..

My LO is 3.5 years old. Completely potty trained but cannot communicate verbally. He still babbles.... I’m conflicted about putting him in preschool due to the fact of my fears of his teacher/s mistreating him. This HAS happened to him in another day care when he was much younger. And DID happen to my siblings and I growing up in several daycares.

I’m scared.

What should I do?