What does piss me off, mind, is when people's only argument is that I'm a man and shouldn't dare to post.
Well lucky nobody suggested that then, huh? Your selectiveness and double standards are preferable to your sheer fabrication. You are not the victim, you are not being silenced, you are not being discriminated against because women are fed up of you seeking out the few spaces where they are centred to whinge about things that you made up, including the delusion that we are objecting to what you are as opposed to what you say and do.
No reasonably intelligent person should be surprised that a female led space centres women, and no person with any understanding of the offline world, where anti woman bias reigns supreme, would think it some sort of serious problem in need of your correction. Like I said, if you're on a noble quest to correct dangerously sexist online spaces, you'd do far better to start with the manosphere.
If you want help with parenting, get help with parenting, and stop complaining about the female-centredness that you now claim you value. You know the place is mostly women, you think that benefits you when discussing parenting, you're going to have to accept that it's still going to be mostly women when that doesn't suit you. You don't get to pull the "I only care about what you say, sex is irrelevant" stuff when you seek a place out because it's largely female, whether that's to improve your parenting or try to claim victimhood.