Episode I: Who caused Anakin not to be accepted as a Jedi Padawan forcing Qui-Gon to continue taking him along to Naboo? Plus who was there to make Obi-Wan Kenobi the teacher to Anakin after Qui-Gon tragically was killed?
Episode II: He had a clear shot at catching Dooku but instead decides to save two fellow Jedi one of whom would eventually go to destroy the entire Jedi Order. Even more, Dooku escapes to give those Death Star plans to Palpatine. So yeah.. those lives lost on Alderaan and the Death Star itself? That's on Yoda.
Oh and he senses the terrible loss Anakin had to deal with and feels the terrible pain he went through.
Episode III: Tells Anakin to pretty much accept loss totally not remembering this is a dude who handles loss badly. That there's no way to save someone you care for. Then is part of the three man cabal (Obi Wan and Mace) that forces Anakin to spy for the Jedi Council what Palpatine is doing.
Had a good chance to kill Palpatine but decides to turn tail and run.
Episode V: Doesn't fill Luke in that Vader's his pop. Even more so when he knows Luke is going to face Vader with no hope at all.
Episode VI: Actually like any dying man fesses up to being an idiot with all the lies and stupidity he's done in his life. Save for his last act not telling Luke that his sister is Leia.