I agree the instructor is doing you a favour. In my company we have 10
Minutes to check in, check weather,notams aircraft serviceability brief the crew
And calculate the fuel before leaving the crew room for the aircraft.
I am currently flying with many low houred pilots and the people who roll
Up their sleeves and get on with it do well but the ones that don't live in the real world that have had mummy and daddy pay for it always find it hard. You should thank your instructor or decide to do something else.