Idk what rock you've been living under, but the new Flash movie got absolutely trashed by critics and audiences, and everyone knows what a huge piece of shit Ezra Miller is.
A lot of the hype for Flash had to do with Keaton's reprisal of Batman. Comparing Miller's lead billing versus Heard's role in AM2 being reduced is a bit farcical, no? The only way to reduce Miller's role in Flash would have been to cancel the film.
You're looking too hard for a controversy that isn't there. This is a Sony live-action Spiderman adjacent film. All of them have been terrible. Madam Web is terrible too.
People criticized Venom, Venom 2, Morbius, and now Madame Web. People will probably criticize the solo Kraven movie whenever that comes out too. It's not a conspiracy against women, it's that Sony seems to fundamentally not understand how to make a good superhero flick.
Into the Spiderverse was pretty stellar though, and Across the Spiderverse was a good sequel. I'd say both are on par with the original Sam Reimi trilogy, with the caveat that they are fully animated productions instead of live-action.
I just watched The Marvels, and I liked it quite a bit, if I stopped short of loving it (but honestly, who LOVES marvel movies? The entire point is high floor/low ceiling entertainment). The plot meanders and it has a typical Marvel "understandable but underdeveloped" villain, but the leads had good chemistry, the switching dynamic was fun, the entire cast from Ms. Marvel is delightful, and Brie Larson is (finally) getting comfortable in the role. I was kinda surprised at how poorly it did, but also kinda not, because fanboys are proving that they really need to see themselves represented or they suddenly develop extremely high standards and demand only groundbreaking entertainment with perfect execution.
The Marvels is a good example of why people are starting to hate Marvel. Unless you'd already watched WandaVision, Cpt. Marvel, and Ms. Marvel you had no idea what was going on. It was like starting in the middle of Avengers Endgame.
I dislike marvel because there is no consequence to their plots and it has gone on so long.
Having to have watched previous movies isn't a negative, just that the content in question was boring and not consequential in it's own right.
The stories are not self contained but other than a couple of very major cross overs there is nothing happening in the movies that impacts the rest of the universe unless it is something important for the plot of the next piece.
I hear you but this one is another in a line of very misguided Sony movies, and the errors made in its production completely undermined both the plot and how it was going to tie into the failing multiverse.
In regards to DC movies, nobody is expecting them to be good for a while yet while they reboot everything. Then Marvel is flagging with several issues but Sony surprises everyone by releasing yet another non-Spiderman Spiderman movie.
Now on top of all that you're right, sexism is playing into this too, especially from the toxic male fanboy culture, but to me this one was already on extremely shaky ground before it was released.
I really wanted She Hulk to work. It was terrible. Moon Knight wasn't perfect, but it had some good action and actual dread.
It's true that female lead movies are judged more harshly, but just because a female lead movie flops isn't always about the female and is about the movie.