No it doesn't work like that as far as the smaller you are the better you shoot. How it should work is when you are smaller you usually are quicker and you usually have or I guess should have a tighter handle with the ball. That should enable you to create separation to get your shot off.
But also usually a team will have a couple of guys that can create good shots for other guys. Everybody not shooting a good percentage tells you it's not just individual skills, we are lacking guards that are facilitators or playmakers. Also somebody isn't doing their job or something isn't happening as far as our offensive plays working.
One of everybody's favorite Auburn shooters is Bryce Brown and if you had to critique his overall game creating shots for himself would be a weakness. And he's not abnormally tall or anything. But he was on a team with other playmakers.