As a student you are paying for the flight instruction being provided. If you feel you are not getting effective instruction then it is imperative you have a sit down with your instructor and discuss the issues.
IMHO it is very hard for a novice student to spot a bad instructor. When I started, I was totally unable to. It was only when I found some seriously dangerous things on a preflight check, but was told to disregard them, that I realised this bloke didn't know anything.
I'm surprised about is that no one has mentioned that different types of instructor suit different people.
There have been countless threads here on this in years past. I couldn't agree more. A young student who has barely got first first job is going to need a different instructor from a BMW Z8 driving high corporate-ladder achiever who (assuming he is actually any good and not full of bu**sh*t as many of those types are) is going to have very high standards and expectations of all people that he works with.