he told me he has never seen someone flying so poorly before.
It was my third type rating session
Sorry to hear you are in such an awkward position:
Your school/instructor should realize that you are there to 'learn' to fly the Airbus and that they should be there to 'teach' you to fly the Airbus.
As 'they' apparently don't intend to teach, ask your instructor to forget the 'holding' and that he just let you fly around for a while on your own.
Try to fly level and accelerate/decelerate to and then maintain two or three different speeds.
Then try to turn to a couple of headings.
Remember:
- As long as 'the bird' is ON the horizon you will neither climb nor descend.
- If there is NO 'yellow speed trend vector' you will neither accelerate nor decelerate.
After that, try some climbs and descends to a few altitudes. (Just three or five thousand feet higher or lower...)
This will all not go 'super', but at least you may be learning a few things . . .