As for my serious point. You keep talking about the "anti-sjw crowd" review bombing movies. What you keep refusing to acknowledge is the "sjw crowd" doing the exact same thing in reverse. I almost hate to point this out but in most cases they're going to cancel each other out or at least make the difference irrelevant.
I don't think there is any kind of symmetry between the groups, that would balance the effect. People angry that the world is changing are more likely to spend their time lashing out IMO.
There's a problem with your reasoning. Well, more than one problem if you wish to stick to the opinion that The Last Jedi wasn't worse than any other Star Wars movie. I actually have a simple system to rate that movie compared to the other Star Wars movies. I saw The Last Jedi in the theater. I haven't watched it through since. I've tried to watch it on at least three different occasions but I can't get more than 20 minutes into the movie without shutting it off and that includes just having it as little more than some background noise.
People can have legitimately different opinions about movies. There is no objectively worse movie of the series. My vote would go to the first two prequels. Those are unbearable for me. I don't like TLJ either, but it doesn't come anywhere near the execrable level of Jar-Jar, or Anakin professing his love while talking about sand. But still that is just my opinion, the rating system doesn't have to agree with me to be valid. Though most system put the first two prequels at the bottom.
IMO there are only three really good SW movies. Star Wars in the original form I saw it in 1977, ESB, in it's original form, and Rogue One. I never really enjoyed any other SW movie, and I don't see the point about trying to argue which is objectively worse, and thinking any rating system that didn't agree with you was broken.