It’s important to not measure your progress against the progress of other people. Everyone learns at different rates, and you also can never be too sure if what they are telling you is accurate or even true. You’re always going to get people who say, “Oh, I was putting in for my test by the twelfth lesson!” or something like that. That’s what people do, and even if it was true, it doesn’t reflect on you or your progress. Another thing I would like to add is that the only person who can really tell you how you are progressing, is your driving instructor. There could be a reason why things seem to be moving slow for you, but you won’t really know until you ask. I think, unless there’s huge personality clashes or inappropriate/unprofessional behaviour, it is worth trying to resolve issues before you ditch and get another instructor. Or else you could find yourself doing the same thing every time an issue comes up. Of course, if you talk it out with your instructor, and they can’t offer a satisfactory answer or a way to remedy your concerns, consider switching instructors.