I cannot think of a worse predicament than being financially enslaved or bound in an unhappy marriage like past years before divorce became acceptable. Never mind the crap about counseling because that only works when both parties still have a measure of love or attraction for each other and are BOTH willing to try. I'd be damned if I'd bend myself into the shape of a pretzel for somebody too selfish or stubborn to lift a finger.
There is NO way I would endure an unhappy marriage, children or not.