Sounds like you've had quite a rough time with your tests. You can obviously drive as you have only had 1 minor other than with the horrible examiner. I think that you get the majors due to nerves, as most people do get minors. So it's clear you can drive, I know someone who failed with one minor and one major because during a manoeuvre he went up a dropped kerb and didn't realise until the back of the car was higher on one side, instant fail at the start of his test due to the nerves and he had a nice examiner, so no matter how nice the examiner is they will have to fail you for the majors. Try and put your nerves to one side and stop thinking about if they say you fail, and if something goes wrong, focus on the next five seconds, as what you do wrong might only be a minor but the nerves may make you mess up even more. Good luck with your forth test, and don't give up.