In his website post, Dr Edwards accuses the programme of minimising issues into its allocated time frame.
"This week I was acting as a support person to someone who is taking a case to the Disputes Tribunal.
"After an hour and a half of questioning by the referee, we still hadn't sorted out the facts of the case, let alone come remotely near to any clarity on who had right or the law on their side.
"Fair Go can get through three such issues in 22 minutes."
Dr Edwards also said reporters had a "vigilante" attitude to complaints brought to the show.
Kevin Milne, who presented Fair Go for more than 10 years, told the Herald he was disappointed at the comments.
"I think Fair Go, for all its shortcomings, has been a fantastic programme," he said.
"To say that the programme over all those years, some way or another did not do its job, I think is very, very sad."