Since flight instructing is one of the few entry level jobs available for pilots, people who aren't good teachers get saddled with having to do it. I've known several good pilots and friends that didn't make good instructors. But, you have to "rack up the hours" somehow, so you instruct.

One thing that instructors, especially at larger flight schools, tend to forget is that students are customers. They are paying for instruction, not abuse. Perhaps if students directly paid there instructor they would realize that.

As a student don't put up with that. I didn't. If you don't like your instructor get a different one. If the school won't switch you, switch schools. If they can't make money with that instructor, they will eventually get rid of him/her.

And, just be aware there are students with those attitudes, too. Just Friday I had to contend with another instructor's student who swore up and down he was ready for a PPL checkride. This was the same student who flew us into a cloud as he was explaining cloud and visibility requirements for Class E airspace, didn't know where the static port on the plane was, and claimed he had never been shown how to do weight and balance.