Just out of curiosity, are/were your parents happily married for a lifetime? If so, what is/was their secret to a happy, lasting marriage?
And if not, were you raised by your single mother or father?
Or neither?
I'm just interested in what led you to such a broad, sweeping, and extremely negative conclusion.
(By the way, I'm single and don't have any kids. As for my mental state, well, I never hide the fact that I've had a lifelong struggle with depression, so if you count that as being "riddled with mental illness," maybe I still fit into at least one part of your stereotype after all.)