Any model could have bad actors, as in, the people within it.
A model where customer feedback is part of it, will fail less than a model where customer feedback is disregarded and the arbiter is part of a system that uses unjust means as a systemic corner stone.
There are no good judges in an unfree justice system, since they aren't paid because people clamor for their services, they are paid thru a confiscatory means. That is an indictment and a guilty sentence from the get go.
My premise isn't that a free market system for justice is infallible, it's that from the onset it's more just than the unfree market for justice that presently prevails. That is self evident, see the rapist / dating advice analogy above and then admit you wouldn't go to a rapist for dating advice...would you?