Unfortunately the discrimination is real.
It’s disgusting.
I know a friend who was the top girl in my class in high school; in grades, in yiddishkeit, in middos. An amazing girl I was friends with who surrounded herself with other yirei shamayim girls. Every single one of her friends was accepted to the same seminary, she wasn’t even offered an interview based on her sefardi last name.
Honestly, why would you WANT your child to go somewhere he isn’t wanted?
Find a school that cares about him, appreciates him, and respects him.