I can tell you a specific scenario I take issue with. At the grocery store the other day, a child screamed at the top of its lungs all over the store. The parent never seemed to notice or care, but people everywhere were looking at each other, all clearly bothered. I'm sorry but that's not my problem, that's their shit to work out and they clearly don't give a shit about others. Shitty parenting, 100% worthy of judgement.
We don't have to assume that everyone bothered by kids at all hates kids or has no tolerance for their annoyances. OP did that, and took out what seems obvious to me as parental stress on users ITT. So I don't really have much capacity left to empathize with them in particular.