Your father needs to sit down with some local personal injury attorneys and choose one to represent him. There is no question that the insurance company is making a very low offer since your father has no lawyer representing him.
I can only answer what I have seen myself (I did practice family law in the past): those "pit bull" attorneys that people think they want for a divorce ending up costing the client and the other party more money, with oftentimes no difference in outcome. Judges have less and less patience for that style of lawyering, too, it seems. Perhaps it's different in other areas of the country.
Have you spoken with your own attorney about this?
You might think long and hard about how you will look to the GAL and the judge by reporting such a frivolous thing to DCF, in my opinion, based on what you have presented in your question.
You need to speak with your current attorney and have her send a notification of withdrawal to the Social Security Administration. An issue may arise if she does not waive her right to collect a portion of any fees awarded, but that would be between your new attorney and her to deal with.
Now, as for the issue of your current attorney not doing her job to the best of her ability, have you spoken with her about your concerns? Some claimants believe their attorney can speed the process along,...