If I may; while all your points are somewhat true and are far from detached from the issue, I think you're being slightly naive.
Thing is, it's not because "marvel is a bunch of SJWs"; even if it were right, this isn't the point, and the ones in charge would get shafted if, even for the sake of progressiveness, they made the house lose millions every month. Marvel is a multi-billions dollars industry, so it's rich enough to despise anything that will make them lose money.
What that means, then, is that there is another actual reason as to why execs allow this shit to so obviously flop and drop, user.
The reason is, they don't care about losing money.
Now, there is only a single situation where execs are fine with losing money : in case of investments.
Marvel is entirely aware that those comics are garbage, awful, ugly, insulting. They know, and they don't care about the content. What they care about is two-fold :
- cost-reduction, namely, retards like Kate Leth and her friends are so weak-willed and idiotic that they are ready to work 20 hours a day for two years for a pay that even mcdonald's robots would REFUSE to work for. They are people with no sense of self, so anything that validates them, any TITLE, is enough to make them suck your cock and drink your shit if you so ask in return. If Marvel says "make twenty of those for monday", they will crawl down and obey and never even ask how much money they're getting from it. They'll do it just so they can scream "I AM A MARVEL CARTOONIST, I WRITE COMICS FOR MARVELS, I AM SO FAMOUS AND IMPORTANT". Marvel aren't stupid, they entirely understand how Kate Leth-likes function, and they abuse them because it's a win-win situation : they spend less money on people who don't even want to get paid;
- planning, namely, comics are dead user, nobody reads comics in America user, no one gives a fucking shit, only passionate people read them and no one likes those fucking nerds
Remember that sketch by red letter media where two marketers yell at a comic-geek ? It's not a joke. It's reality user. In short : Marvel doesn't like comics, because they barely rake in any money even when they're created and marketed right. They're not profitable enough.
However, MOVIES BRING IN BILLIONS IN, NIGGA
Marvel cares about movies, wants more movies. However, they know that after two, three, perhaps four of the same superhero on the screen, audiences lose interest. They need to be told there's a TOTALLY NEW HERO ON THE BLOCK that is so cool, and not at all retelling precisely the same story as the previous one, just with a different beard ! Nuh uh ! It's all new !
So Iron Man, Thor, Captain America, etc., they're temporary. They're temporary because after a while, nobody wants to watch their shit anymore (except, again, nerds, but fuck nerds, amirite ?). That's not where the money lies.
So what they need to make sure happens, is that they have a neverending series of creatures they can just pick and put in a film, and everyone will flock to it as long as there is mindless action, some smidget of romance/emotion, and a predictable plot that will allow you to go on facebook during the film and still not be confused by what's happening.
In ten years, user, Marvel movies will be Hellcat and Squirrel Girl. Not because of "progressives" or because of "SJWs", they're tools, they're ammo, they're worthless, they're money-machines. No, merely because at least it feels new to dumb audiences who spend their cash on anything that entertains them for two hours.
Those comics are garbage because they are made by incompetent, talentless hacks; but the quality of the work is irrelevant if it means you can pay the artists close to nothing, and ensure that you are getting a new feature film in ten years that will live for at least five more years of billions of dollars.
The only thing we can do to ease the pain is die.