This is true of fans of anything, really - I've experienced it first hand with GotG Vol. 2, a movie that expanded on so much and was so awesome and better than the original in so many ways, yet because it was different people disliked it.

I haven't read too many opinions on The Last Jedi, because I haven't yet seen it and don't want to be spoiled (not that I care too much because Force Awakens didn't do a lot to make me care about this trilogy), but from what I've seen I've already noticed some of the people criticizing it are the same who criticized GotG Vol. 2. So, I'm not too worried.