Probably Funimation VAs working with a well known music YouTuber and ANN covering it. If anything, it could be Funimation, ANN, #KickVic, and #KickVic supporters going all in to establish themselves as the closest to mainstream anime can get.
And it's sad that's it's gotten to that point, given Funimation's contempt for anime and its fans and the fact it's mainly top of the heap because it survived the Anime Boom of the 2000's going burst during the Great Recession and was in the best financial shape of those that survived.
Combine that with companies like Disney opposing anime and seeing it as a threat to their Marvel capeshit gravy train and the Woke Left's general hatred of anime and its fans with only a very small handful of exceptions* and I get the feeling that the trend of "weeb shaming" and hating on anime and manga in the 2010's is heavily astroturfed and backed by certain specific media corporations in the United States to prevent competition.
I think the "weeb shaming" trend likely did originate organically as the result of the more cringy and autistic elements of the fandom during the Anime Boom of the 2000's but it's also become too widespread and too long-lasting to not be at least partly astroturfed and a lot of the same talking points tend to be way too uniform and also generalizing, which is more common with astroturfed movements.
The only "acceptable fandom target" that I can think of who got this level of sustained hatred for more than a few years among both "normies" and geeks alike would be the furries, but furry was a unique situation where the fandom is too broad and decentralized in its concept and that it never had any period of commercial success or a boom period where it was a fad that crossed over into the mainstream for a while, and furries have always been in smaller numbers than the weebs.
*-The two main exceptions to the SJW hatred of anime are My Hero Academia and Sailor Moon, the former is likely popular since it's both "Naruto for Zoomers" and is also superhero related (as SJW's tend to gravitate towards capeshit) while Sailor Moon gets a pass because of Millennial nostalgia and the fact that it's a majority female cast with two major lesbian protagonists (Sailor Uranus and Sailor Neptune)
Gimme all the puzzle pieces and trash cans you want, but it's some food for thought