Not sure why you thought you had to solve all these other people’s problems, but it seems to be a strong reason why you divorced - unrealistic expectations on you without them taking any accountability for themselves.
I’m going through a divorce right now, just a couple years older than you. My family is very collectivist, hers individualist. They are so individualistic in fact that they literally don’t see a problem with getting pregnant by other men (gay friend for example) because “her body, her choice”, even when married.
That said, I refuse to believe this is the large majority. Billions of females in the world, millions of potential matches. The chances that there aren’t many many good ones I can match with are vanishingly small. Granted, the effort in finding them … that’s another story.