If someone is greatly disturbed by children not behaving in shul, perhaps they can go to a hashkoma minyan so they can concentrate on their tefillos.
This past purim, I was surprised that many mothers brought babies and newborns because the shul had a party to break the fast and have music afterwards. I asked one mother if she was concerned that she might not hear the megillah if her child makes noises or cries and she shrugged and said I don’t really care, what I hear, I hear. I was very miserable during laining because the kids did make noise. I also never brought little ones to laining until they could be quiet, but it seems like today it is a different generation.
The end of this is that I decided that next year I will attend a different kriyah for megillah where I can be sure I can be yoetzai the mitzvah.