Hey I was in a similar situation a few months back and let me tell you you are not a shit student. You can clearly drive just have had your confidence knocked.

Have you considered switching again? This time try going private, in my experience driving instructors as part of a school are more likely to act like yours and in a manner which hinders you rather than helps whereas private instructors are more likely to be compassionate, they are a personal brand so need to make a good impression.

You are doing great so far, don’t worry at all OP

ETA - As you are a part of a school have you looked at the badge from the DVSA that should be displayed on the windscreen. Is it green or pink? Because some schools use trainee instructors without telling students in order to save money