The below article suggests that mediation is not working and there is no doubt that if a divorcing/separating couple cannot talk to each other about their separation and if there is a lot of anger on one or both sides, mediation is likely to prove difficult.  However, mediation and, indeed, collaboration works very well for a number of couples and leaves a far better outcome overall than if a judge has to decide on how each party has to live their future which is what court proceedings ultimately mean.