I understand that but at the end of the day, most people are trying to get signed up for another six months with the minimum of drama and an extended argumentative debrief is probably not high on their wish-list. There are normally friendly trainers or Standards pilots who can explain/educate in a non-jeopardy environment, plus provide appropriate feedback if necessary.
After 4hrs inside an unreliable box on legs, it’s the last thing you need. I agree about leaving unsure but as long as you clear it up before you go flying again, confidence can return...