You're original point was that he we a
bad sharingan user. I just proved that he's
the best at using it, not the best at fighting without it. The feats I showed you are cannon and they all exhibit Sasuke doing things with the Sharingan that were groundbreaking at the time. Sasuke used all stages of the sharingan to the fullest extent and went toe-to-toe with opponents that were faster, stronger, and more experienced than him, and without kamui at that.
Molding Amaterasu is not copy-n-paste
Neither is Injecting enton into a moving wind shuriken
Perfecting the full use of Chidori is the only debatable copy, and even that takes tremendous amounts of skill.
You are wrong this time. Just sayin'.