One thing I wish Disney/Marvel, maybe just action movies and tv shows in general, would do more often is sit with the grief and trauma they put characters through. They create these characters with feelings and thoughts and they put them through hell and expect them to bounce back from that every time, move on as if losing the whole of something that made you who you are is nothing. Are you afraid to show a character in mourning? Melting down and pushing through it? It’s such an easy way to get your audience invested because we want to see them be better. To heal. Not act like nothing ever happened. Have a laugh and move on from something so damn traumatic. Let them cry. Let them hurt. Let them fight back in spite of all that, but never let them forget.
Edit: They started to do that with Thor’s character, I think. But they also turned that into a joke and I’m still not over it.