Why do people automatically dislike me or try to bully me?

I get that a lot of people are assholes, but it’s starting to get out of hand where multiple people are developing hatred not just people at school. I’m not ugly or attractive I’m very average looking in appearance. I’ve seen people who were much quieter and louder than me who were generally liked or had lots of friends. I know not everyone is going to like me but I really wish I knew the exact reason why others seem to be turned off by me.
Why do people automatically dislike me or try to bully me?
Post Opinion