What do when it's a court order when the dad pick child up every other sat and sunday for 4 hours and he start a fight

It appears that the safety of the child is at concern here. You should go back to court and amend the court order to either supervised visitation in a public place or pick up / drop of at a Police Precint with Driving License and Car Seat inspected by a police officer. Feel free to contact my office and speak with a case manager at 877-866-8665 or email help@smsattorneys.com as we do also offer reduced price services for PRO SE people who can't afford an attorney or would like to represent themselves in court.