In my life I have witnessed in myself and others the same feeling of an instrument not fitting well. I have also seen looks of disbelief. A friend of mine was asigned the upright bass in high school. I had a cello. It didn't matter how we liked it. I had a Howard Roberts as a kid. It was big. My teacher said after a while I'd get used to it. He was right.
But we are grown men. We don't have to put up with that anymore.
One of my guitar teachers was Joe Fava.
We were in his small teaching room, and he would smoke. He focused on technique and stopped me everytime my fingers didn't move correctly. It was constant criticism with occasional "good". I practiced this uncomfortable technique two hours a day. Eventually it became natural. Violin players told me the same thing. I wouldn't dare to complain. He'd say play your instrument properly or quit. Eventually it because okay. I went through the same with a bass clarinet.
I have a H-575, two actually since I'm borrowing one, but like the feel of the H-530 a bit better.
To get sentimental, I enjoyed the days being a kid and having a strong teacher who told me exactly what I'm supposed to do. It cut out a lot of noise from the other voices. Then Hendrix came along.