Luke was always quick to action and even in ROTJ, took a moment to do the right thing. So I don’t see any problem with the way he told it to Rey the second time. It fits his personality.
Here’s the thing, even if Luke messed up like that, I can’t fathom that he would not immediately do everything in his power to make it right. His most important distinction as a character was that he is the ONLY ONE that didn’t give up on Anakin. Here he just gives up and goes into exile. And I don’t care if in a novel or whatever it says that he went on a journey that made him realize whatever, the movie starts with Luke already altered and no glimpse of how he got that way is ever shown. Something that important should’ve been in the movie.
And his first lesson with Kenobi was to act on instinct.
That’s precisely it, that was at the beginning of his arc. Luke evolved throughout the OT movies, and then he just forgets ???
And then when Kylo Ren destroys the new school and kills all the students […] Luke is crushed.
Vader directly or indirectly committed genocide of hundreds of thousands of Jedi. His empire killed, tortured and oppressed trillions. Kylo is not even close to how bad Vader was, come on. And Luke still believed Anakin could come back, but not Ben ??
He is a side character there to aid the success of the main characters.
Sure, but he is a legacy character who deserves some continuity to his story. Let’s look at some other characters in Legacy Sequels:
Imagine if in BR 2049 we found Deckard hating and hunting replicants again, going against how his arc ended in the original BR.
Imagine if Maverick had given up on flying in the new Top Gun: Maverick because he lost a wingman even though we had already seen him overcome a similar tragedy in the original.
Now let’s look at Creed. Similarly to Luke, Rocky doesn’t box anymore. But his character is still a fighter at heart, he fights through cancer while training and believing in Creed.
I don’t have a problem if a character changed in the span of years, but the change has to respect the character’s existing journey. And if you are going to drastically change him, then at least SHOW how the change happened. Harvey Dent, Michael Corleone, Walter White, heck, even Spider-Man in SM3 (not that great a movie but it shows the change clearly), they are all examples of stories that SHOW good characters turned bad.
Edit: I don’t think Luke is evil in TLJ. Just contradictorily pessimistic.
And just to clarify, I honestly think TLJ is the best film in the ST. But Luke is just wrong.