I didn’t mean to make you feel bad. With practice you’ll be able to draw it quickly, too.
The vertices on the edge of the hole that I checked weren’t on the centerlines of the block shape so I deduced that the circle wasn’t drawn on axis. To make the bushing or whatever that is, I started by copying the edge of the hole from the component and pasted it in place outside the component. By doing that, I knew I’d have a perfect fit. I drew the rest of the bushing in place in the hole. Although it’s not difficult to move a component into place precisely, it’s even easier if you don’t have to move it at all.
In your model there are also missing faces and reversed faces as well as extraneous edges. All of those things would prevent them from being considered “solid” and printable.