Sharpness is certainly not something I lack from my 35mm negatives. What seems to be lacking compared to larger formats is more in the realm of tonal gradation where one shade of a particular color fades into another shade. Or in abrupt tonal shifts, like a sharp line between shadow and a bright surface, where the border between the two becomes less crisp with higher magnification.

The above doesn't stop me from thoroughly enjoying 16x20" prints from 35mm, which can be beautiful if done right.

Keep shooting. Keep smiling. Have fun.