I at one point had to say to Rian, 'I pretty much fundamentally disagree with every choice you’ve made for this character. (Mark Hamill)

Luke Skywalker is the staple character of the nine Star Wars films. He is portrayed by Mark Hamill. Ranging from being a newborn at the end of the Prequel Trilogy, to the icon everyone knew in the Original Trilogy, to what is effectively a grumpy old man in the Sequel Trilogy. He was flanderized to death in the Sequel Trilogy.

Why He Severely Lost His Charm As mentioned above, he is extremely out of character in this film. This is one of the reasons why Mark Hamill hated Star Wars: The Last Jedi .

. Rather than helping Rey with her training, he nearly refused. Usually, you saw Luke Skywalker be optimistic, which is what a Jedi represents; regardless of what age they are (i.e. Yoda was older, and he was still optimistic). In fact, Luke Skywalker can be compared to Superman (DCEU) very easily! Both were iconic heroes who were flanderized from being optimistic, yet still heroic to being grumpy and showing negativity all the time. The only difference is that the former aged, and the latter was always a young man in their respective cases. When he was handed his lightsaber by Rey, he foolishly threw it right off the cliff. He didn't bother remembering his twin sister Leia Organa, his best friends Han Solo, Chewbacca, C-3PO, and R2-D2. There was a disturbing moment where he was milking an alien just for something to drink. Luke Skywalker was supposed to represent hope, and in fact, Star Wars IV: A New Hope was referring to Luke Skywalker himself, which is an emotion about showing optimism, positivity, and not giving up even when it seems like it's always lost. When he faced his nephew Kylo Ren, he told him to die, taunted him, and humiliated him as opposed to what he did in Star Wars VI: Return of the Jedi where he told Darth Vader (who was one of the most evil guys) that there was still good in him! He even went as far as to try to kill his own nephew! He died at the end with no proper explanation. Luke Skywalker was flanderized to the point that even Mark Hamill himself said that the character WASN'T Luke Skywalker at all! This spawned the famous "Jake Skywalker" meme mentioned below.

Redeeming Qualities Mark Hamill put in an outstanding performance. In "The Rise of Skywalker", he told Rey about the error his ways and taught her not to do the same thing.