Sadly, the legal profession is far too often not good at dealing with their individual clients and the adversarial nature of courts in the UK makes matters even worse - solicitors become fixated by the game and often intimidated by the perceived obstacles and costs of it all. In the process, the fairness side of justice gets trampled and the human elements squeezed out. There is evidence that there are lots of people around who feel the entire justice system in the UK needs a comprehensive overhaul and the largest component in that are those who have been processed through the system and found it unsatisfactory (not just because of the final result but because of what it puts you through). I was once involved in a civil case/dispute and, out of dissatisfaction similar to your friend's, I changed solicitors because I could not stand being ignored and kept in the dark. There was some suggestion as the case progressed that this counted against me, perhaps that I had shown disrespect for the profession - an oddly partial approach I thought. There is very little realistic chance of seriously questioning how any solicitor (less so a judge) conducts him/herself - they are a cartel. Mind you, the medical profession is probably even worse than the lawyers in the way they protect each other and literally bury their mistakes.
I have heard that in other countries a lot of civil disputes can be and are resolved much more amicably and satisfactorily through dispute resolution boards (often with no solicitor/lawyer in sight) which leave people feeling that the handling is more transparent, fairer, quicker and cheaper than is the norm in the UK. Maybe the UK will follow on in the coming decades.
Unfortunately, I know practically nothing about divorces so cannot be of useful help in that regard.