The Last Jedi ACTUAL Rotten Tomatoes popcorn score is 24 percent
youtube.com
youtube.com
You'll find that many 'blockbuster' movies with high average rating have reviews with lotsa insanely high 10's and lotsa 1's on the other hand. I've found the 1's are more trustworthy overall (plus, if you don't mind spoilers, there are hilarious plot analyses to be found).
I think the existence of this bimodal distribution is at least consistent with the "haters gaming the system" theory, though not conclusive.
The IMDB ratings for the last jedi do not seem to exhibit such a strong bimodal distribution: https://www.imdb.com/title/tt2527336/ratings?ref_=tt_ov_rt
Which I think leads more credence to the theory that haters are overrepresented in the rotten tomatoes numbers.