Flying instruction involves two very different skills: being a good pilot and dealing with people. A lnumber of instructors seem to have the flying skills but not the people skills. They really aren't emphasised that much on instructors courses, if mine was typical. Some seem not to like people at all.
I've had both good and bad instructors, and that applies to those with both low and high hours. Some low hours ones are fresh and enthusiastic, some just incompetent and inexperienced. Some high hours ones are very good and love the job, others are disillusioned and burned out.
But one thing is certain, as everyone has said; you have a right to find one you get on with, and not put up with any !!!! until you do.