So here's the thing:
A superhero movie (we're talking about the MCU in particular but DC movies also fit in here) is never going to do anything beyond a surface-level mentioning of a big societal issue for a few reasons. For one, they are designed as mass media to be consumed by the largest audience possible. There's nothing wrong with that, by the way! But it also means these movies are going to try to remain as uncontroversial as possible, especially in a world where simply announcing the next logical story progression (say, for example, Falcon taking over as the new Captain America) is treated like the end times by a significant segment of the population.
But a larger problem is that these comics are set in a reality similar to our own, and thus know that they can't actually solve those issues. Actual comics have the same problem because let's face it: someone as smart as Reed Richards would be able to solve world hunger, but he's never going to because there always has to be conflict in the world. Much like they can never build a prison that can actually contain the bad guys, the superheroes are never going to solve societal issues because that would remove potential conflict from the story. Which means you always end up with a story where the various superheroes may be exposed to *insert social topic here*, but that's always going to be the extent of that interaction. Sometimes the hero may even say something like "we need to do something about this" to show they care, but 5 pages later they're back to punching bad guys.
Thus you end up with a conundrum. Do you give credit to a superhero movie for recognizing that we do, in fact, live in a society, or do you ask why they can't do more? It does not help that these movies, subjectively, do not do a good job with these issues. Black Panther, for example, gets hailed as a movie that tackles racism, but that racism is ingrained into the backstory and character of the main villain Killmonger. The racism he endured informs his character, but his solution to the problem is to become more violent because he's the bad guy. You end up with a messy situation where T'Challa is forced to try and thread the needle between "racism is bad" and "we can't overthrow the society that was racist to you". I don't think it necessarily does this successfully, but that failure is only caused because of poor choices to set the story up in this way.
I have other problems with this idea (including the fact that these stories are told from very privileged positions both in the writers room and on the screen) but I'll leave it at that for now.
Shang Chi, Echo, Werewolf, Black Panther are all my faves! I've never been particularly impressed with Scorsese's work (but he seems pretty impressed with himself 
), and if he doesn't like them, he doesn't have to watch them, it's that simple. I know they're in talks to make movies/ series with Echo and Werewolf, and I hope they cast Native actors for the parks. Marvel has some really, really good material in its pantheon. I admit I haven't seen very many of the films (because I am just too busy), but I have enjoyed and been impressed with what I saw.
