Let me think about this, comics included.
Captain Marvel has always just been there in the comics. She didn't really get people feeling one way or the other, until the comics made her actively fascist when they had their Civil War plotline. Being the first female-led Marvel movie, made certain sections of the Internet get really insecure, and that's the Brie Larson hate train that Youtube still tries to link people to. The movie is fine, but they made her so powerful that they have to keep her off the stage, and it didn't exactly make her lovable (and her very few Endgame scenes were shot before Captain Marvel, so she comes off even worse in them).
Ms Marvel is far and away the biggest success from when the comics tried to introduce many new teen characters at once (like three supergenius teen girls within one week, uhh). Their biggest fault was bogging her down with the 'let's replace mutants with inhumans' angle. It was amazing to see the show manage to capture the spirit of her books while doing its own thing... for two episodes, after which it forgot to be about her and just became an incoherent mess about nonsensical baddie bad guys.
Monica Rambeau has never been a big name in comics, with her biggest contribution being wearing the Captain Marvel mantle during the original Secret Wars. I always liked her, so imagine my vibes when MCU forcefully introduces her character in Wandavision with 'Wanda randomly gives her the powers she's supposed to have, then she'll say 'they'll never know what you gave up' when talking to the supervillain that was keeping a whole town captive and just had to stop doing it'. How is anyone supposed to like her after that?
So, yeah, while much of the active dislike of them is just the Internet automatically really hating having women in their movies, it's also not the strongest basis for a team-up, when the biggest character draw in it relies on people having watched a (very ethnic) teen show on Disney+...
I think Madame Web is the most obscure thing Sony could dig out of their Spider-Man And Related People folder. The backlash would be the same by itself - it's kind of a nonsense premise, and Sony's standards are firmly set somewhere around Morbius level.
Wonder Woman had like a billion dollars? Wankanda Forever made 800 million roughly.
Folks loved Black Widow and Scarlett Witch, Storm from the X-Men (a solo Storm movie when?), Black Cat, Silver Sable, She-Hulk (but NOT the TV version), Jean Grey, Rogue, Pyslock, Emma Frost, Mystique, etc...
The ladies of Agents of Shield were popular, folks loved Jessica Jones, etc..., heck even back on the 70s folks loved Linda Carter's Wonder Woman and the Bionic Woman, Charlie's Angel's were kind of Superheroish, more so the 90s movie though.
I'll also point out that the majority of folks that went to watch the Marvels were men like me, women barely show up at all.
Brie Larson alienated a large part of the fan based by being, very, very unpleasant when she was younger, although she seems to have matured alot and I'll leave it at that. Water under the bridge, at least for me.
Mrs. Marvel should have been introduced in a Spiderman movie, without side lining him in his own movie, get folks liking her, then do her TV series, split the story into seasons instead of jamming all of that in one, with the huge tin switch in the middle.
I can't speak to Monica because I haven't seen Scarlett Witch yet.
Instead of telling fans what they should want, give then what they keep telling you they want.
If you want to increase female viewership BTW, add in more sexy men, it worked very well for Aquaman which did better then the Marvels did among women.
And you need a new face for Marvel that will rebuild confidence in the brand again.
Superheroine movies are very popular, but they need to do better with the male led movies, or it will continue to hurt female lead movies as well, because a large part of the male audience will continue to feel like these movies aren't made for them and their business isn't wanted.
We saw how audiences reacted to the emasculated male statement of DADHAT Director.
You want male audiences in greater numbers, they need to feel like you respect and value them, then they will have no problem coming to movies like hypothetical Black Cat, Spiderwoman, Storm, Gunnverse Wonderwoman, Supergirl, Powergirl, etc..., because they won't feel like they are being erased or humiliated or sidelined.
If you also want to boost female audiences, more attractive men and more romantic relationships.