How would they not even know that there's been a main character woman until just now? That would be the ultimate outing as a poser even if you only watch the anime, you've likely seen the next MC online at some point.
I mean, there were people outraged about them "turning Batman into a lesbian" in response to Batwoman, who has been a lesbian in comics for years (there was even a storyline about her getting married but failing) recently. Don't subestimate poser nerdboys.
You talking about that terrible looking Batwoman show? I don't think people cared that much about her being a carpet muncher when the rest of the show looked liked total ass and cringe. indeed wasn't the whole backlash to the show because of the cringe?
Batwoman is a terrible show and you should feel bad for defending it. Nobody had a problem with Kate Kane being Batwoman as it is part of comic book canon. What they didn't like was her stealing Batman's stuff and saying "I'm not going to have a man take credit for a woman's work." Or this gem: Luke: "The suit is literal perfection." Kate: "It will be when it fits a woman." Fucking cringe!