I strongly dislike children
Why don't you like children?
When I was in high school, there was this kid in front of me who kept finding faults with me.
It's ok not to like certain things as you are human and have your preferences. It's not good, however, to base your dislike on a single experience as not all kids are like that.
Why do I have to still be a kid? Others around my age in the same class are so stupid and annoying.
If you are still a kid yourself, then its possible there are just certain kids you don't like. Spend your energy finding good friends that you can spend time with.