I really want to encourage debate on this topic to see what you all think! The following is purely my opinion.
The Luke Skywalker portrayed in The Last Jedi
has been subjected to much criticism: he’s too miserable, he’s uncharacteristically sceptical and he does not represent the Luke that Star Wars fans grew up with.
Such criticism is flawed.
Before analysing this contentious criticism, one should consider the development of Yoda’s character. In short, Yoda was a serious Jedi Master in the prequels, whereas he was portrayed as a senile (at times comedic) character in the original trilogy. Parallels can be drawn between him and Luke.
Luke has witnessed the death of his father, the destruction of his Jedi Academy and now the death of his close friend Han Solo. He has become disillusioned with the Force; can you blame him? The film’a director has actually turned him into a three-dimensional character - a stark contrast from the goody two-shoes that he was in the OT. This makes Luke more realistic