I have no stakes in this, as I've neither seen Mandolorian or Book of Fett, but this is what I hate about almost everything after RotJ that involves Luke. He solves the Jedi/Sith crisis that the PT was all about in RotJ. As you mentioned, the old guard give him a no-win ultimatum: kill Vader and the Emperor or die trying. Luke not only succeeds but he redeems Vader and he does it because it was out of compassion and love for him and his friends. At that moment, he is past the old teachings. His path wasn't like others that came before him, he did not receive "proper" training, and he was firmly emotionally attached to those around him, and he still got the job done. He's not like the old Jedi, he's human.
I don't think Luke would've been upset at either Ben or Yoda---as at this point, Luke is a man---but his experience would've at least proven to him that he can strike out on his own now and doesn't need their guidance any more.