Why are people so mean to us autistic people and dislike us so bad?

What did we ever do to you guys? Growing up, I was disliked a LOT! I was picked on the most, I was the target of jokes and people pushed me around and tricked me into do stuff I did not wanna do. Being an autistic kid/teen was hard but being an autistic adult is worse. People yell at you more and curse at you harshly because apparently now you’re “an adult” so people are meaner and tougher on you.