child support

When A and B were married, A stayed at home with the kids.  B went to work.
A did not work, did not have a college education, and had never been introduced to full-time work.
A did not bring in any money.

A and B got divorced.
B insisted that A pay for medical expenses, school expenses, and other child expenses, which A did without finding full-time employment or receiving a college diploma.

A and B had to go to court to settle child support.

At one time, B was paying child support to A.
B had a reported income of over $60,000 annually.  B never fully disclosed how much money B was making, so approximately $60,000 is the estimate that was used in calculating B's child support payments.
B paid approximately $400 a month for child support.
This represents approximately 8% of B's income.

Soon, A will pay B child support.
This year, A made less than $7,000 annually.
A will be paying approximately $200 a month for child support.
This represents approximately 40% of A's income.

This is difficult for me to take without exploding into rage.
I cannot think straight.