What is best way to walk away from ongoing case against at fault driver with $25k insurance when victim now is brain injured permanently w/o $

Victim suffers on medical financial levels. Now - no car-unable to drive-cannot work-doctors reports accident caused forever injuries ....hope is untested surgery etc so victim is without funds to go to more doctor / legal appointments etc, local free health clinic will not treat as long as there is case in court Diminished returns to continue Attorney feels other side wants to go to court and will not settle Doctor reports as good as it gets Stress is severe. Blurred vision. Huge painful headaches. Docs will not agree to treat signing that the will not sue beyond any settlement Doctors all say get settlement then decide which treatment surgeries is affordable but attorney wants more unaffordable medical treatment What are options to stop case. So at least STRESS is reduced and local health clinic can treat. Thank you