Here are the main things wrong with the family court, in brief.
The best interest of the child (BIOTCh, pronounced "bee-otch"). It substitutes the judgment of strangers for the parents. There can be no parental rights, as long as they are overridden by a stupid judge or shrink. It is contrary to Rule of Law.
Child support formulas. They support the custodial parent, not the kid. They are onerous. They provide bad incentives for divorce and child custody fights. They are worse than income taxes, because they are not based on actual income. They cannot be reasonably adjusted, because of the Bradley Amendment.
Marriage law. A variety of changes have made marriage law all about money, and unrelated to the resulting children.
Domestic violence. Criminal accusations belong in criminal court. Otherwise they are irrelevant to family court. People should be innocent until proven guilty.