Why do you/some people have feelings of serious resentment towards children?

Inspired by the conversations towards the end of this q but also by many anti-kids answers on Fluther. As I say, I would be the last person to imply anyone needs to have kids just because that’s what many in society do, so this question isn’t about whether with child or without is better.

I just want to understand what experiences have brought you or those people you know who only think of kids as dirty brats to think that way. This question echoes a recent question about thoughts people might have about hating animals and how others reflect on those kinds of feelings.

Again, realistically speaking, not everyone likes kids. I just want to know if you think people should like kids or whether you think there is some psychobabble (which I take with a lot of grains of salt) behind those emotions that make people truly dislike children. I don’t want to put forth a notion that everyone who had a bad childhood or issues with parents will dislike kids since just as many of us who had same do like kids and are perhaps acting out our own psychological issues by having kids. So it’s not about that…

Just want to understand emotions I don’t understand. I don’t think my feelings towards kids changed because I had kids though I am more tolerant of random babies screaming on the bus or what have you. I always liked kids, I guess or felt neutral about them. I want to know how you get from feeling neutral about them to feeling negatively about them, especially if you don’t have kids and never plan on having kids yourself. Please be civil.