I understand the frustration but it is also a no-win situation as stopping a vehicle to pick up passengers on a highway is a dangerous situation and would just open up the company to further liability. I do expect a company like Lyft to have a provision for 'emergency' services - such as AAA or towing companies whose drivers are trained specifically for such incidents - to 'rescue' stranded vehicles and passengers.
That said, I do feel Lyft in general has much less culture of service recovery and compensation, which is quite unfortunate as Uber is a very poor company in many other regards.