Something like this happened to me, I used a generic mouse, but when I had a DA I couldn't grip it well, it was uncomfortable and I couldn't get used to the DA.
Then I bought another mouse with the smaller shape and this one was almost perfect. I had it for several years until it broke.
Then I tried other mice and I couldn't get used to any of them, the mice make me have to adapt to the grip of the mouse and they don't feel a natural grip.
Sometimes I don't understand why gamer mice have weird grips, even generic mice have a better and more comfortable grip.