One thing that also bothers me is that he doesn't seem to openly acknowledge my progress.I think he does but I would like to have some sort of evaluation for myself.
Silence from the sensei means that you have much to learn. And you need to acknowledge and accept that. When you have practiced for many years, you will come to the realization that only you can gauge how far you have progressed.
Although lack of positive reinforcement is not motivational, it should also not demotivate you in your practice. It's just what it is with some senseis.