Generally the sentiment I've seen online is that it gets a lot of hate for a handful of things, Fin / Rose, Snoke, the hyperspace attack thing, Rey being "too good", and just generally the way Luke is portrayed. I agree with you about the casino stuff being too long, and I kinda generally agree with the complaints people have about Snoke being wasted. I would maybe understand the complaints about Rey being too good if that wasn't the case for Luke in the original trilogy as well. Just my 2 cents though. I do need to see the movie again though, I don't think I've seen it since the theaters.