“Existence is suffering” is a foundational tenet for many worldviews and religions, not just antinatalism. Existence is literally the first cause to all suffering - no existence, no suffering.
Acknowledging that doesn’t make me depressed or pessimistic, it’s just acceptance how things are.
You’re free to live in whatever fantasy you want, though. That’s your right.
Also, responding to differing worldviews with “get help” is generally bad form