I remember when my best friend got mad at me for the school giving me extra time on exams, saying it's unfair. Like no, due to my ADHD the goddamn 20 minutes of the exam time, which is 40 minutes, i spend it either dissociating or overall being inattentive. I can't help to be this way and it hurt me to hear such a thing from her.
I’m so sorry this happened to you. Some people really don’t understand how and why accommodations work. You’d think, though, that a friend—especially a best friend—would make an extra effort to understand and learn, so they can avoid being a complete jerk.
And people get after us for saying hurtful things.