They gave me the hardest task of parallel parking
Why is it hard?
Even a perfect parallel parker doesn't have an easy time with it and it was unfair to give that task to me.
If you keep at it, you'll probably figure it out. Think about how many things in your past you thought you wouldn't be able to do, and then you did.
It's still crappy that they gave me the hardest tasks on the driving test.
Driving tests are designed to test all aspects of driving, even the hard parts. You need to be proficient in driving before you take the test and not blame the test when it is hard.