Back during the WCI arc, Urouge being confirmed to have defeated a commander was really impressive.
But now that we got to the point of the story where characters like Luffy, Law, and Kid have defeated the Yonko's, and characters like Zoro and Sanji who have defeated way stronger commanders, the whole Urouge defeating Snack is just not that impressive anymore.
Also don't forget that we never saw Snack in action and he was confirmed to be the weakest of the commanders, heck some people also believe he was probably weaker than even Perospero.