Re: Dead end?
Nothing wrong with being impatient, btw. As my teacher says, "beginners can't afford to have beginner's mind." Beginners have to be enthusiastic and impatient and want it all now--that's what gives them the energy to get through the phase where you know nothing.
What you're hearing is a bunch of perspective from people further down the path who are crediting your teacher with possibly knowing what they're doing. Just to pick one point out of your OP, focusing on suburi impresses me--there are millions of people out there doing kata very badly, but if you want to learn how to handle a sword, basic, boring suburi is where you have to start.