Candidly, if half of your friends are in regretful marriages and 90% of the people you encounter are "crap" then I would be questioning your social filtering.
When those of us with noble traits -- intelligence, empathy, morality and so on -- refuse to reproduce, we do so at the cost of allowing the OTHERS who lack those traits to make up a larger and larger percentage of the population. They WILL reproduce.
Food for thought.