IMO, the second they made their writing submissions page into a 'community' is when it started to go downhill. Anytime there's a community for something, it's always going to invite the spastic autists that enjoy that thing. Not saying it wasn't kinda autistic before, but after making a virtual meeting grounds for these people is when shit really started hitting the fan.
I could just be retarded and gay, but for me that's when the SCP fandom went to hell. The hierarchy started to get co-opted by the woke crowd, quickly ascending their ranks by bitching and moaning their way to the top, then they promoted the hell out of their cringe-inducing OC's that would have fallen to the wayside in the past.
Where it used to be about the interesting lore behind creatures that would gain them popularity on the page, it's devolved into which perverted fantasy mod/influencer 'X' wants to experiment with through a writing project on some sentient trans-AI. Sure, there used to be a lot of shit before, but part of the fun was sifting through all the ass to find the hidden gems, and those gems would gain popularity which transcended the SCP project.
And I have to disagree that SCP hasn't absolutely bended the knee to LGBT. They've basically handed them their passion project, I don't know how much more welcoming you can be than that. But of course, anyone who knows anything about anything knows that it's impossible to please this group.