I agree with that last statement 100%. The instrument a player "deserves" has less to do with their skill level and more to do with their
commitment. (In fact
I blogged about this sort of thing once.)
You probably aren't improving a lot, but trust me... that's normal.

Progress can be slow, is seldom a straight line, and can happen so gradually that you might not even notice. Tugging on a plant won't make it grow any faster--some things take the time they're going to take. Recording yourself helps here, as does revisiting those old beginner tunes that you remember struggling with but can now probably play much better!
(Although it may be worth looking into how you're practicing, and seeing if there can be any improvements there. Thirty minutes of deliberate practice beats five hours of muckin' about.)
And as you probably know from your recent EdD (congrats!), it's always a challenge for an adult to get back into that beginner/learner mindset. We're so used to being good at nearly everything we do all day, and picking up "sorta new" things quickly, that it can be a rude awakening to be in the mode where new things are hard, and you're frequently lousy at something. It requires dusting off those old skills we had as a child: Amazement and appreciation of even the most mundane new ability, the willingness to bear (and even enjoy) being however good we are at the moment, and infinite patients with ourselves and our progress.
Anyway, congrats on picking up a wonderful instrument and welcome to the forum!
- Jeff (former Boston denizen myself!)