Sounds like an american school i attended some years ago it was all "money money money" If it is the same school perhaps there looking for a way not to employ you? a bit strong perhaps.
Anyway I have experiences of this type of instruction too, I fully understand whats going through your mind, I had to change schools in the end because of the style of instruction and found the new school corrected problems (percieved) in my flying technique within 1.5 hours of flying, its different methods for different people.
For me it would have been far easier to have let you get to a point which he thought there was no chance of it happening, go around and give you an airbourne lesson in experience and discuss it later unless safety was compromised, it may have been a failure still but probably more constructive and im sure you would have taken the critisism far better,
after all from what you are saying this school has completed your training so therefore its indicative of what they have taught you.
Stick at it though as it sounds your almost there, grit your teeth, say thank you and smile
Good luck with the rest of the training
