Re: ineffective technique from sensei?
Personally, I have had a few people challenge/question my teachings and some of the techniques I use. After the first time, they were convinced that they work. If you have any doubts about your sensei, then talk to him and ask him what you have to. You might find out there is a method to his teaching. How long have you been practicing aikido and how long have you been with this present sensei?