While I had my problems with the movie, all in all I liked Star Wars: The Last Jedi. It was enjoyable and had lots of surprises to it.
But there are those who do not share my opinion.
There is an on-line petition to have Disney remove the film from being canon and do a new episode 8. And they have gotten over the desired amount of signatures for it. I’m sure someone at Disney or Lucasfilm will make some kind of statement in reply, but not much more.
One of my co-workers signed the petition. He was one of the fans like myself who had enjoyed the books and comics that for over two decades had built up an amazing and enjoyable continuation of the Star Wars universe. In talking with him I found it interesting that he actually believed that it had been the plan to adapt those stories into movies. I had to explain to him that even if Lucas was the one doing the new movies, that whole storyline would have been ignored and that Lucas had nothing to do with creating the Expanded Universe.
The one conclusion I told him he had to accept was that no matter what, Star Wars Episode 8: The Last Jedi is now canon, no matter what his views on it are. It has been long understood that no matter what, the films are the final say. Aspects of the EU have been undone so many times due to the films. This is nothing new.
So even if The Last Jedi were a total bomb and everyone hated it, it would still be canon. However, it has received critical praise from reviewers. People are flocking to see it world wide and it is on track to hit the billion dollar mark. And the movement against the film looks to be largely inflated by organized trolling efforts.
There really is no reason at all for Disney or Lucasfilm to remove support. All efforts are going to focus on the next film to finish up the trilogy, followed by more one shot movies and a new trilogy not focusing on the Skywalkers.
So for all those who dislike the Last Jedi for whatever reasons, it is canon and nothing is going to change that.