Star Wars : The Last Jedi is a disappointment

I saw Star Wars 8 today. I liked some parts of it, and disliked some of it.

My main concern lies with the way the movie shows Luke Skywalker in his old days. He is old, bitter and full of regret. He is also a killer. He is radically different from the earlier Star Wars movies. I liked him.

Then there is Supreme Leader Snoke. Star Wars 7 had him as the mysterious bad guy. This movie kills him without any explanation.

Also, who is Rey? I know so far that she is a girl who can use Force. There have been two movies and yet there is no clear information about her and her backstory.

I cannot wrap my head around this movie. It is a good movie. It is a bad Star Wars Episode.