Judges/Courts wouldn't have such a hard time with custody/visitation decisions is so many parents didn't lie and use the court system as a weapon against their ex, regardless of how it hurts the child.
Sorry, I don't 'great parent' from either the mom or dad. JMO
I think this is absolutely true, that judges can be desensitized to accusations made by parents, because it happens all the time in family law. Unfortunately, without actual convictions or protective orders, judges often can't/won't just cut off visitation between a child and a parent who actually may be abusive. Evidentiary rules can prevent judges from seeing information that would make any one of us think a parent was a danger to the child.