I'll attempt a real answer. I don't hate kids or the parents of kids who care for them and raise them to be good people.
I hate that societal pressures place having kids at the near top of life's implicit goals. I hate that my wife and I almost had kids because of these pressures, when neither of us really wanted it. And if it weren't for one (slightly older than us) couple we were friends with sharing that they were childfree, we would be there, and likely unhappy about it. So we speak out, not out of hate, but just to provide the other side, it ok to have kids... It's ok to not, it's a choice.
Totally fair. Societal pressure is something to completely ignore though. Everyone doing the 'pressuring' can go fuck right off.
I have a kid. Second one on the way. I also don't like kids. None of them. I tolerate mine. I mean, I do all the good parenty things and stuff, but I can't wait for them to grow into adults.
That's the whole reason I want kids. Not because I want kids. But because I want adults I can call my children. Frankly, I don't know why, I just know I do. And I'm prepared to make the endless sacrifices that come with it. And I totally understand other people who don't want to do it.
Also, I hope to be able to raise some decent humans. The world can use those. It seems like assholes are breeding like crazy. I hope to offset that a little.
I don't hate kids, but it would be a horrific nightmare for everyone involved if I had some of my own. Never wanted them, never will. I do adore my niece.
it's okay to not want them, but calling them "shitty fucking kids" or "crotch goblins" or other stupid names is a different matter and only reflects badly on the person who says these things
Noisy pestilent stupid destructive little goblins that demands your attention, resources and sleep lest they die. And should the child grow up to be dysfunctional shithead you are to blame. And should you recognize that you can't raise the child and give up for adoption, society brands you a failure and possibly induce massive trauma on the child.
But as my friend says: "they are cute while they're sleeping"