It's sad that some people don't take the job as a flight instructor seriously!
I remember a FI that came to our school. The first time I was to fly with her, she looked rather grumpy and told me I didn't have to do the preflight. This made me nervous as our CFI had told us that this was paramount. Then, when I started reading the checklist, she just gazed out of her window and didn't pay atention whatsoever to what I was doing. When I came to the Taxi checklist and said, Brakes, check left, your brakes... your brakes, YOUR BRAKES! it took some time before she responded.
The rest of the session continued in this manner and by the end of it, I was furious.
I wasn't worried over the fact that she'd been horrible towards me, but more over the fact that she didn't seem to care about what I was doing. A teacher needs to be into the flying loop as much as the student does to prevent small mistakes from going to far.
Later I (and many of my classmates) expressed our thoughts and she got better. By the end of the term we were good friends and I thought of her as a good FI.
In your case though, the solution seems to be to change instructor. I this isn't possible, you'd better chat with him or change club.
regards/lns