Re: Master/slave relationship and Instructor with ego
There is repeated advice that one cannot change a group.
By virtue of nothing more than your presence in the group, the group is changed; members will have experiences that they otherwise would not have had by virtue of their interaction with you. You cannot know how you will make a difference.
That said, don't stay with the intention of changing anything and do not leave because you cannot. Go to practice aikido there or elsewhere if that is right for you.