So you failed on the reverse and then nailed the drive. And then nailed the drive and failed on the drive.
On my worst day watching me reverse an artic is comedy gold. For everyone but me. So there is no shame in that. The fact they you got it mastered second time shows you can do it. Some days the trailer does what I want - some days it has other ideas.
The driving was probably nerves. Get it booked in and get it passed. If it was easy it wouldn’t mean anything. Then you can go from making silly mistakes on test to making silly mistakes whilst getting paid.
I do stuff nearly every shift that would fail me a test. Be that taking too many shunts to get onto a bay, or even being in the wrong lane at a roundabout. It’s life. You only need to get lucky to pass for an hour. After that in the real world, it’s expected you will occasionally ■■■■ up. Just take it really slow next time - when they ask you to pull off taking some deep breaths and chill.