The most annoying child age starts around age 2 and then around age 4 they tend to get more annoying.
Then from there the child can be annoying until around 8 years old.
Although it can vary from child to child but you'll certainly have an annoying child around age 2 and up until at least age 8.
However I've known some children who were annoying until age 14.
Still though all children are annoying and even parents what to get away from their own children for at least a little while even though you love them.
My oldest son was annoying at age 4 and until age 8 and then after that he began to get less annoying.
There were times I wanted a break from him and I would send him to his Grandparents house while I got things done around home or relaxed.
I love my kids but sometimes you just need a break.
All kids will be annoying so if you don't like someone annoying you then having kids is not worth it for you.
But for me they are worth it even though they can be and were annoying at time.
However after age 8 then the parenting of the child or teen can get harder and then the teen years come and the annoying age of 4 to 8 seems like a walk in the park.
While cases vary across parents, a survey of more than 2,000 moms showed that parents of 12- to 14-year-old teens had a harder time than parents of toddlers, elementary school children, high school children, and adult children.