This may not be an exact fit for the discussion you want to have, but a tangential issue worth considering: Because our society is so prone to binary thought, toxic fandom results in the marginalization of those who do not love the property, even if for legitimate reasons. In some circles, you either loved TLJ or you’re an alt-right asshole. Personally, I hated TLJ. I wouldn’t consider myself a toxic fan by any means, first and foremost because I wouldn’t consider myself much of a fan. I grew up on SW and loved 4-6 as a kid, but found them largely unwatchable as an adult. I think Lucas is a great idea man and a pretty terrible writer. Like most, I thought the prequels were a dumpster fire. I actually enjoyed TFA (for what it was–a cleaned up version of A New Hope) and Rogue One. But I thought Johnson dropped the ball on TLJ. I thought the character development was sloppy and inconsistent, the writing had a Lucas-esque quality of banality, the meta-narrative was a bit up its own ass, and Ren’s motivation is more laughable than terrifying. That said, Rose was one of my favorite characters and I thought Dern did as a good a job as could be done with the material given to her. I don’t have any issues with the direction that Johnson wants to take the story–I just don’t think he did a particularly good job navigating. Unfortunately, toxic fandom has stifled legitimate debate to some extent by causing well-meaning fans who like the property to dismiss legitimate critics outright as “one of those” (worst case) or at least subconsciously defend the property more vigorously than they normally would because it’s no longer just an issue of taste, but rather an issue of maintaining the moral high ground.
Obviously this isn’t the main problem, and I’m certainly not a victim in any sense of the word, but I do think the phenomena deserves some consideration (though it may be more of a symptom of our crippling propensity for binary thought than the existence of toxic fandom).