Every single frame with Yoda using a lightsaber is awful*. Even putting aside what it does to his character, and to paraphrase someone else who said this previously, shoving a firecracker up his ass and lighting it does not make it remotely passable, let alone “fantastic.” It makes it wretched.
Oh and the force duel between Yoda and Dooku is really bad due to poor CGI alone.
*Except for (maybe) when he uses it on the Wookiee planet. But still.