Is it okay to dislike/hate a child?

If you dislike a child or even hate a child, is that okay if you don’t abuse them?

If not, why?

If so, why?

For example,

Disliking a nephew or a niece due to them being a brat? Or disliking a student of yours due to them being disruptive?

Do you have to always been kind and compassionate due to the child having issues and being a child?