I'm aware of Rautins' stats. 40% was an off-the-cuff remark because I knew off the top of my head his best season was at 40%. I didn't think that would be the sticking point, as it wasn't the crux of my post.
Rautins was critized only as a freshman because of the legacy thing and his 32% shooting on very limited playing time as a freshman wasn't a topic of much discussion. In the subsequent years, he was rarely criticized, it certainly wasn't constant criticism, because he produced. The point was, and remains, that Rautins was a top notch shooter who was a top notch shooter practically his entire life and remained a top notch shooter his entire college career. Any nominal improvement in 3-point percentage over his college career is the culmination of multiple factors; coaching is near the bottom of that list.