I know we're not talking about me, but there are plenty of people who lead happy lives and I think most people (though this is speculation, I can't point to any evidence - so maybe I should say at least "many people") find life to be more good than bad. You say that people with good parents also suffer horribly. Well yeah, some of them do. Some people with horrible parents and traumatic childhoods also grow up to lead great and happy lives. It's up to the individual largely, early influences can have a powerful effect on you but some people work through that stuff and come out the other end, and some people don't. I'm not going to just assume that some future theoretical offspring of mine is going to suffer horribly. Of course they'll suffer sometimes, but hopefully their life is more good than bad. There's a solid chance of it. And hey, you know, my parents and my siblings are all happy people, too. And my parents' parents were, too. I think the chances are much better than average that if I had a kid, they'd have a pretty good life. I know lots of people who are more happy than unhappy.
I know we're not talking about me, we're talking about people in general, but I'm just trying to illustrate that human life is not guaranteed to be miserable, far from it. I think rather than committing species suicide, we should keep working to solve our issues.
"studies show that humans have a bias towards life being better for them than it actually is" - I don't quite get this statement. Perception is reality. If a person feels like their life is good, then it's good. If it feels like it's bad, it's bad. As always, it's a matter of perception. It sounds kind of like you're describing optimism, pessimistically... optimism does improve the quality of your life.
The urge to reproduce is the only reason there is a human experience. Without reproduction, we go extinct. That may be your goal, but I don't think it's at all realistic to expect others to agree with that goal, nor do you find that goal in any other life forms I'm aware of. Or if extinction isn't your goal with antinatalism, then maybe your goal is to just greatly reduce the number of new humans born to help with overpopulation. In which case, how would such a system be regulated? Who gets to have kids?