I feel pretty much the same about this negative perception on SU being popular. I do feel like the discourses and drama that happened, especially the 2015 incident, played a part in that in a big way even though at the same time i feel it's not entirely the show's nor Rebecca's fault those happened since that is unfair but it does seems people see SU in a unique way when it comes to the negative that people probably don't care
Well, yeah, i kinda agree on that. Some fans on this website were treating Zami070 like she was a dictator over her drawing style. But that's what happens when you lack zero awareness and don't reflect on your actions. For a show that was trying to teach "love and tolerance", many fans seemed to completely ignore these lessons and used it to push their own agenda:Ships,headcanons,bullying and harassing...
It's not suprising there was so much discourse when the episode "Bismuth" came out because some fans had the same type of mob mentality that Bismuth had. The difference was that at least with Bismuth you could understand why she acted the way she did. These people? There was almost no explanation. So, its no wonder why they missed the point of the episode and got angry when they were proved wrong.
It's not SU's fault or Rebecca Sugar's fault that for a long time this fanbase was considered one of the worst cartoon fandoms. She tried to stop it many times but the infighting and bullying went on and on.
As for the negative perception that Steven universe has: Many people were ready to tear down this show apart before it started airing back in 2013. I don't know if you haven't read Introvertceleste posts about Crewniverse members talking that there were already people complaining about Garnet's design and how she's was "an awful role model" or Steven being a "straight white male" despite being different from your classic stereotype and sometimes acting as a trans metaphor (see Diamond's days arc).
For a few years the series was well- received. Animation fans and reviewers liked Steven universe a lot. Then in 2016-2017, a few videos rants on youtube started to pop up. Some of them would get tons of views. This made other youtubers say "Hey, let's do this thing, it's going to gives us hundred thousands of views" and that's how SU hate train started.
SU youtube rants start getting recommended, each one more spreading false rumors and more missinformation than the last because they were desperate to "destroy" a children cartoon.
Then you have the "Steven universe critical" thing that while they started pointing some issues the show had over time it developed into nitpicking, harassment to other fans and writers over ships and right down making up bullsh*t to make SU or the creators look bad.
They started calling Rebecca Sugar every name under the sun and making look like she was the next Hitler. The funny thing is that Rebecca was actually nicer than most of these so called "SU critical" and probably she didn't have any idea that they existed in first place.
She didn't encouraged harassing, she didn't say that SU was only "for lesbians and women" (in fact she created this show for a boy demographic but those who wanted to gatekeep the show seemed to forget about that).
As why this happened i can think of two reasons:
1)Cartoon Network's horrible schedule: The haituses of SU were ridiculous.We only got 3 or 4 episodes every 6 months. This made fans become more and more frustrated or many just dropped the series.
2) The purity culture that this website has: It's pretty common for cartoon tumblr to put on a pedestal shows that have representation but in the moment it does something wrong,everyone stars hating on the show. It's always the same thing. I think the exception to this rule is Kipo and the Age of wonderbeasts as it didn't get very popular.
I swear, just wait half an year and people are going to start hating on The owl house which is only on its first season And calling the creators horrible things. Right now its happening the same thing that happened with RS and Noelle: She's being treated like a god and the moment she says or does something wrong,bang! She gets cancelled. That's how it works.
The issue is that creators that are LGBT and minorities often get more hate for putting representation on their shows than those who don't. Many are afraid of writing their own stories out of fear of being harassed and acussed of transphobia and homophobia. It's counterproductive and very bigoted.
The most frustrating thing about this for me is when i see cartoons fans putting SU on the same level as Voltron. You know? The show that did a "Bury your gays trope" by killing one of the few gays characters? All this while Steven universe being the show that really cared about putting LGBT couples in first place. And this is something that many cartoon fans fail to undestand: No, it wasn't She-ra 2018, Kipo, The owl house or Adventure time that started all this. It was Steven universe, yet they ignore its cultural impact most of the time. It's very frustrating.