I guess you had a pretty unpleasant life so far? Not everybody's has sucked. But I don't think I need to form a coherent argument against 'all reproduction is inherently morally bankrupt ' - it's such deliberate bait that it rejects good faith discussion off-hand.
Is there a more coherent argument to be made against hyper-natalists? Yes, I think that could plausibly be upheld. But that would be a more nuanced stance. The world, despite its trajectory, is not a hellscape.