BG- I think you are sneakily avoiding one or two points- you have said that this situation is not "just/solely about you and your circumstances"- when suggestions were made that your DH contributed to paying off the loan.
Does this mean that you could, as a couple, afford to make payments, but you choose not to- and then blame the system for being unfair to women?
I think you need to look at the loan in the samw way as any loan- if for example, I had a car loan before I got married, it would when I was married a "joint debt"- certainly in law! Therefore, our joint income would pay it off.
As you are unable or unwilling to work full time and your H played some part in creating your children, then he should also contribute to the cost of the loan and pay it off as soon as possible.
You seem to be constantly ignoring the fact that you chosen to have 2 children very close together and presumably did have a choice int THAT- yet are unwilling to accept the effect that has on your income.
My parents waited 6 years before I was born, due to lack of money and another 9 years before my brother arrived- again, due to saving up for an extension for another bedroom!
You can't have it all.
I don't know how old you are- you won't say- but if you had waited til your 30s to have children, you might not be complaining so much now.