Supporting your child is fair.
Child support (the current system) is an abomination against good fathers.
Its financial formulas are absolutely broken. Instead of taking a part of what you earn, they take a part of what they think you should earn. Bankrupting you if don't and failing to pay well to a child if you earn much more.
It should just take a percentage of take home with a basic floor and leave it at that.
---
It is also massively incentivizes women to hold onto the child and not share custody.
The default position should be 50:50 custody.
If a man doesn't want to do that, he should pay more.
If a woman doesn't want to do that, she should pay more. As is it is, a woman gets a massive pay day if she pushes for more custody. This is sick. She should get a massive pay day only if a man doesn't want to help.