From the States here, but still, I can totally relate! I just got my license about six weeks ago (very very late in life, ha). I felt pretty confident beforehand, until I took some lessons at a driving school and the guy was adamant that I wasn't ready to take the test. Went to a different school and the guy basically drove me around the exact route I'd be taking on the day of the test, told me exactly what to do, etc. When I finally took the actual test, we didn't even do half the things I'd practiced, and in fact I ended up making the examiner mad because I was trying to complete things like putting on the parking brake and such and he was like, "C'mon, c'mon, let's go already!"
Technically I should have failed the test because I didn't successfully parallel park, but the only reason I didn't was because the examiner was too impatient to let me do the last forward-back thing to get myself fully in the spot. As for the rest of it, who knows? I certainly wasn't demonstrating much of the stuff I'd learned.
So yeah ... I agree the test didn't accurately assess my skills. I drive around now feeling like I got away with something and maybe if they really knew, they wouldn't be letting me out on the streets. Maybe that's how all new drivers feel, though.
Then again, I look around at some of the crap I see other drivers do and think, "How the hell did THEY ever pass their driving exams?" So there's that.