It was mainly a lot of little things that bothered me and really added up. I didn't like a lot of comedy, and a lot of things felt forced and cheap. Like how BB-8 was used for comic relief every time he was on screen, and saved the heroes like 5 times. Hux was reduced to a silly comic villain and they started him with a way too drawn out prank call scene, which also was at the start of the movie and set the movie off to a weird tone. Rose was a pretty terrible character and Canto Bight was executed really poorly. (however, I disagree with the criticism that Canto Bight was a total waste of time and didn't amount to anything. At least it showed that the good guys can actually fail and plans don't always work out.) The flying Leia was really silly. Was not a fan of the porgs at all.

There were also some sloppily directed scenes, like when Finn and Rose are being held down and surrounded by stormtroopers, with Phasma right in front of them just about to kill them. Then after the hyperdrive through the ship, Finn and Rose are all alone and the Phasma enters from the other end of the room with an organized group of stormtroopers behind her?

Also didn't like that the majority of the conflict of the movie was just a slow-mo starship race and I really think there must have been SOMETHING the first order could have done to get even the slightest bit closer to be able to fire on them? It felt very boring and hard to believe.

That being said, there were a lot of cool scenes and I already mention how much I liked how they did Kylo Ren. It wasn't a bad movie. I liked it a lot more than Rogue One. And I totally admit that part of my dislike of if is because of expectations. I had enormously huge expectations going into it and it was really disappointing. Meanwhile Justice League was an objectively worse movie, but I enjoyed it more because it was at least better than my extremely low expectations