-The Finn and Rose story really bogged down the film, removing that part would make this a way better movie.
-Snoke's death. Amazing moment with the lightsaber fight right behind it. While I would've loved some backstory people forget that the emperor got introduced and killed in the OT with LESS backstory than Snoke.
So you disliked the story of Finn and Rose, characters who matter but wanted more story elsewhere.
I am going to give folks a word of advice. Go to a movie to enjoy it not pick it apart. It meant to be entertainment, not a time to play Rex Reed. You will enjoy things more if you do this...
Although just because you went to a movie to have a good time doesn't mean you will have a good time. Force awakens was pretty good. rogue one was very good. Last Jedi was bad.
The central plot of of trying to outrun the bad guys while a hero goes to a casino for help was like a bad plot out of the 1980s battlestar gallactica. I didn't know which character I was supposed to feel attached too. There was no emotional investment. Characters and plot points resolved too quickly. Too many lame jokes, like a shirtless Kylo Ren... The lame joes felt more like Guardians of the Galaxy than Star Wars.
And most of all, this movie tried to ruin Luke Skywalker and all the triumphs of the rebellion in Return of the Jedi. Luke is a failed teacher, attempted murderer, grumpy loser, and a jerk. Great, that's not very entertaining. So much for the mythology and hero's journey that made the original trilogy so great.
Anyway, if you liked it cool. Enjoy. Adventure movies in particular are indeed made for popcorn entertainment. But if someone doesn't like it, don't point the finger at the viewer for having a bad experience. There are many more reasons than what I listed for a person to not like this movie.
I disagree with your take on Luke. He is far from a jerk, he is too caring if anything. He sacrifices himself to save Lea and what is left of the resistance, and makes it a point to comfort her through his spectral self despite the cost it takes on him when doing so. He is a jerk the same way Yoda was when he first met him. The portrayal of Luke was outstanding. He is at the same point Obi Wan was when we first saw both characters in Episode IV. He is too hurt with his past failure of Kylo Ren going to the dark side to allow himself to help anyone, like Obi Wan was after he failed with Vader. The twist this story takes from there reflects what Yoda tells him, one of the best lines of the film imo "The greatest teacher, failure is Luke. We are what they grow beyond. That is the burden of all true masters."
The past failure is the best lesson of all, it is what will make the next generation even greater if we pass on that lesson instead of hiding it.
This portrayal of Luke also shows that the legend of Luke Skywalker is having a tremendous impact across the galaxy, inspiring young kids everywhere. As with all heroes and legends though, the reality is different.
In the end we see Luke demonstrate the greatest, most impressive command of the Force we have ever seen, and then go off after becoming one with the Force at peace, with future purpose. Powerful stuff.