I think he messed up by scaling his blade down to be proportionate with his size. Granted, he probably would've accidentally cut himself in half centuries ago if he had a full-size lightsaber, but he keeps fighting six-feet humans with their full-size sabers - and losing - so I wonder if it's his little blade putting him at a disadvantage?
Lightning-fast frog-hopping can only get you so far in a fight.
He should've easily bested both Count Dooku and Palpatine. He just had the wrong equipment.
