I think given the ages/genders of the people involved we can solidly point to male Gen X and some older Millennials as basically 100% of the problem here (I’m sure there has to be at least one female commentator with similar attitudes, but I have literally never come across a single one).
Particularly this sort of currently 45-60 age-range group, who were old enough when a lot of this stuff - Star Wars, and 1980s cartoons particularly, that they saw it aged 12-24, and felt like they “owned” it, and engaged with it in a slightly different way to younger people, in a more obsessive and “You’re not allowed to change it” kind of way.
Star Trek also got this, because people these ages often saw and engaged with TOS entirely before TNG (whereas to even me at 43, any TOS is just fairly early childhood memories - TNG started when I was 9), so tended to see TNG in the context of TOS - and again, apparently totally failed to understand that either TOS or TNG were progressive - TOS because by the time they were born, a lot of the progressive stuff in TOS has been normalized, and TNG because they just saw it as a continuation of TOS, and especially given how a lot of S1/2 episodes of TNG were actually kind of backwards, they didn’t get it.
Hence we have all these awful Gen-X wankers (and sadly some easily-convinced Millennials) throwing a shitfit about “woke” culture, where “woke” means “just basically modern, not even particularly daring” and extremely mad that people are “ruining their childhoods”, but they’re taking themselves much more seriously than in the Prequel era this time, where it was all kind of so dumb it was funny (hence Prequel-hate appearing a lot in comedy as self-satire, c.f. Spaced etc.), now they’re all old, cranky, paranoid and mumbling about “agendas”.
It was definitely very much a “2017” thing for the starting point (no coincidence Trump was in power and promoting these kind of views and paranoias, I think), because literally all the big “SJWs ruined it!” stuff is from that years:
March 2017 - Mass Effect Andromeda launches, has big problems. Awful Internet Men go to huge, insane lengths to try and “prove” SJWs ruined it somehow, and even where MEA fucked up progressive stuff and appalled progressives, they take this as evidence. It was demented and involved them harassing the hell out of an individual (and of course female) animator. Most of the real problem was simply trying to do too much in too little time on a basically underfunded project whilst literally 90% of the top talent in the studio (including people supposed to be working on MEA) were being put on to Anthem by Aaryn Flynn in a desperate attempt to get it out of dev hell.
September 2017 - Star Trek Discovery launches. Like literally every Star Trek show, S1 is kind of a mess. It’s arguably the least bad S1 of any Trek show, hilariously, but it’s treated as a terrible SJW crime by Awful Internet Men. They really, really have it in for Michael particularly. The most amazing thing that emerges from this is a bunch of 40-50-something dudes unironically saying “Star Trek shouldn’t and never has been woke!!!”, and it’s like, literally, if one show on TV can genuinely, honestly claim to have been relatively woke, it’s always been Star Trek (exception: Enterprise - nothing at all about Enterprise was remotely woke). Like woke in a genuine way too, not just a “shorthand for modern” way. Basically everything woke? TNG and DS9 were all about that (VOY too in its confused-ass way). But apparently Disco was a step too far, though apart from a universal hatred for Michael, the exact issue seemed to be hard to pin down, probably because they didn’t want to come out and say they didn’t like “the gays” (and too many of them were horny for Tilly for the “there shouldn’t be chubby people in Starfleet” deal to go far - though some real incels did try to make it happen).
December 2017 - The Last Jedi comes out, and whether it was a masterpiece, a flawed masterpiece, kind of shit-show or anything in-between, the extremely loud Awful Internet Men crew was keen to blame the SJWs (especially they seemed mad because Kelly Marie Tran was insufficiently fuckable for them - how dare a woman not meet their standards of attractiveness yet appear in a movie? - and Luke was insufficiently cool for them to live out their fantasies through him - which was somehow an SJW thing?!?). There were people who didn’t like the movie for more legit reasons but they tended to cross over pretty hard with the Awful Internet Men, and only when they realized that this crossover was going to make them look bad did they try to distance themselves, instead of agreeing with Awful Internet Men and upvoting them and so on (even when their posts were full of poisonous misogyny and so on, but also happened to knock Luke’s presentation or something).
It’s kind of calmed down now, but it predates TLJ, it just became spectacularly obvious there.