It is a class thing.
Most of my guys under the age of 35 are not married. Many have children.
The loss of benefits to their family if they get married is so high they choose not to. Which leads to serial families with various partners.
Getting married is viewed as something you do if you are upper middle class, or older than 40.
And I see the same social issues bubbling up as we move into the second and third generation with no fathers.
Want to improve parenting? Remove incentives for single mothers. Increase wages so a two parent household doesn’t mean the kids are raised in daycare. Penalize bastards so there is a disincentive.
None of which will happen till a collapse of society
Who are “my guys” you are referring to? Do you work with young men somewhere, or in your family, or who exactly are you talking about?
Or provide tax credits for a stay at home married parent. And, tax credits for school choice/let the money follow the child.