While I was disappointed with Yoda in the prequel films, I did like him for the majority of it. It also was the first time that he became a CGI character instead of a simple puppet.
The original trilogy suggests that Obi-Wan Kenobi was his Padawan, it turns out that it was him training the guy that trained him. Besides the teaching of Count Dooku, we do learn that he was teaching the really young future Jedi the basics of the Force before they could get their own Jedi Masters assigned to them.
Then neither him or Mace Windu could sense that Supreme Chancellor Palpatine was really the Sith Lord Darth Sidious.
I thought his battle against Count Dooku was kind of disappointing. For the most respected Jedi for his time, he never has a decisive battle.
I knew watching Revenge of the Sith that he would lose against Darth Sidious, and their fight was okay.
He falls from the Senate and runs away in defeat. I still don’t understand from that viewpoint of why he didn’t try to continue the fight, especially as Luke Skywalker was not known to him to be a future hope for the galaxy.