I don't doubt that the way it's animated and rendered have some fault in how bad this model looks, but I maintain that's not entirely the case when simpler renders look better due to simple design details
Im praying for the day people realize that 90% of the issues with modern sonic is that he's poorly animated, not that hes a bad model.
Look at the pre-rendered cutscenes for Unleashed, Gens, and Colors. He looks amazing.