What were the main plateaus that you all experienced in your training? And how did you manage to overcome them?
When you're learning a new skill and it doesn't matter what it is, you'll experience plateaus, it's only natural. Whether it's learning to hover, flying a decent circuit, controlling the aircraft in autorotation, navigating etc. I bet all pilots who post in this forum have experienced them at some time or other. The best way to overcome them is to practice and have some self belief.
As for your personal circumstance, I agree with others who advise you to change instructor if only when you need to practice autos. All instructors have to start somewhere, but being taught by an inexperienced instructor is like "the blind being led by the short sighted" and is not giving you the firm foundation you need to become a proficient pilot. Your instructor sounds like they need some help from the CFI to regain their mojo.