it'll probably be impossible to get an instructor that will just allow you to use the car for a test, most want you to take 5 or 10 hours in such a situation.
You sound like a right spoilt little brat, the reason instructors tell you where to go, even if you're driving around locally, is to get you used to taking directions and following them, you know, just as you'll be doing on test, when you've passed and are in your own car, do what the hell you like, drive where you want, until then, take instruction from your driving INSTRUCTOR
And the roundabouts, maybe he thinks you need extra work on them, you as a learner clearly have no idea how good or bad your driving is, and what needs extra work and what doesn't, the fact you say you're no good at right turns about sums up your driving ability, emerging from junctions is about the simplest thing you could do, you shouldn't even need to think about them as you approach your test, the fact they still need work and your test is in two weeks beggars belief.
If you cant even get the absolute basics right, you may as well cancel your test now, because you'll make a spectacular fool of yourself