There was an interview with a lawyer who disputed Betty's theory that no lawyer would represent her. His words were, and I paraphrase: "Yes Dan was a shark but San Diego is a very large city with many sharks, she could have found someone."
Agreed. In normal life lawyers, judges and court staff get divorced. There is counsel to represent the opposing spouse, often gleefully. Perhaps things were different back when this case occurred, but the fact that Dan was an attorney, president of the bar, and wealthy would not be a hinderance to obtaining counsel. Being a very difficult client, as Betty was, coupled with not paying your legal fees would present far more problems to maintaining representation.