Well first these are the frequent talking points of incels when they harp on what they consider “low value females”. If you find yourself constantly repeating such devaluing talking points, maybe a break from the internet would do you good. Secondly, and more generally, it is usually more attractive to talk about the things you love than the things you hate. Unless you have already established that you and the other person hate the same things, then you can bond over that too.

There are more appropriate ways to say this:

"Nobody with kids. I might want kids some day, but I’m not ready yet, and it feels like there would be too much pressure to either be involved with her kids or be cut out of a major portion of her life until we’re really serious. And again, not ready.

And somebody athletic, since I’m into biking and hiking and other activities that require a certain level of fitness.

And… well, somebody who isn’t into the whole casual sex thing, honestly. I think sex is special and, for me, requires a strong emotional connection. I want someone who has similar views on sex."

See, I feel like it changes it when you’re not focusing on the other person, but yourself. I’m not ready for kids, I’m into fitness, I’m a demisexual. It sets up the same thing without disparaging people who aren’t what you’re looking for.