I wonder if you'd be complaining about the system if you'd passed your test.
The system is fair. No, they don't make up faults. They may, at times, make errors.
If a test is carried out unfairly, that can be complained about and investigated
and if found to be true, a free test will be offered.
As for the "only being retested on the parts you failed on," how would that work
exactly? A driving test isn't an MOT test. They're there to make sure that they
only allow safe and competent drivers on the road. So, what if during the interim,
your overall standard of driving had fallen dramatically, but they only test you on
the parts you failed on, and so, you slip through the net?
Surely, if you're not just test standard, but also ready to drive on the roads alone,
you should be able to prove that to examiners? Why would it be a problem, unless
you can't prove it?
I've noticed how the only people who claim the test and system are unfair and
rigged are the people who fail. Not a coincidence.
In the end, we all have to go through the process if we want to drive. We all have
to jump through the hoops, and perform to standard, and complaining about it
won't help you pass any quicker.