Same experience
I’m only a PPL as you know, but I had a similar experience in 2019 where we were skimming just above the top of the canopy in a fully loaded B2, which had a number of missing / defective (non mandatory) instruments from my vantage point in the back.
I too elected to take the winding and arduous car journey back to the airport on the return leg.
I didn’t leave any feedback for why I cancelled the return. Who am I to question a professional, but I felt really uncomfortable for the entire trip.
Just some honest feedback, and I’m sure the actions of that one pilot are not necessarily reflective of the company in its totality.