I can understand why. Canto Bight.
I adored the film, but it was definitely too long, and Finn's entire arc was not only completely separate from the rest of the characters, to the point that only Poe really knew what he and Rose were off doing (and damn, I don't think anyone even noticed they were gone? Even when they were evacuating from the ship, did anyone ask where Finn was?), but his entire purpose for going to Canto Bight, this huge side arc that the audience had to try and engage in at the same time as the two core plots of the film, was ultimately completely unnecessary. Their goal of cutting out the hyperspace tracker... thing, wasn't needed. The rebel leaders had a different plan in action, and could have told him
"don't risk your life with that, we're going to stealth evacuate and trick them into blowing up our empty main ship and thinking we're dead."
BUT IT GETS WORSE
If Finn's actions had only been unnecessary, that might have been bearable. Instead, because they brought along the wrong hacker, who overheard Finn's comms, the hacker sold the information of the Rebel's stealth escape plan, which directly lead to not only the deaths of the majority of the Rebel resistance, but also to the death of Luke Skywalker, arguably the series' core hero. I mean... holy fucking shit, writers. Finn would literally have been more useful if he'd remained in a coma for the entire film. Luke would still be alive, as would the majority of the Rebel army. I don't even...
And get this.
The one article I can find defending this plot arc says the only reason it should be praised is because it allows a black and an Asian character to be heroes for a bit:
"Seeing a young Asian woman and a black man on a mission to save the galaxy is very much a part of what Star Wars can offer a new generation of filmgoers. To complain that it dragged in places compared to the angsty drama of white characters Luke, Rey, and Kylo is to miss some of the aspirational purpose of Star Wars." Rather than arguing that maybe the heroes with good writing and valuable plots should include characters of colour, we should be happy that an entirely separate plot that is
less than inconsequential allows characters of colour to have their big screen moment for a bit? I can't even...
So much of the film had some of the highest highs in the entire series to me. But the writing for Finn and Rose here is so bad it's literally the worst thing that has ever happened in the series imo. Genuinely feels like the writing team said "we need to do something with our black character." And then cobbled together a plot with so little thought put into it that they didn't even consider it would have been better for the overarching story if that plot hadn't happened at all.