Still not about morality. Actually, it is the opposite.
Cersei on Game of Thrones called Joffrey a monster, but she'd never kill him and was shattered by his death. Does that make her moral?
		
		
	 
Well, I guess the notion of morality is subjective, so that writer is entitled to their own opinion on that matter.
Joffrey was their son, it's understandable. Bucky is not Steve's brother or another kind of blood relative. Also, you can't really compare Cersei with Captain America by their moralities. Too different characters. 
	
	
		
		
			Cap has PTSD. alright. Do the movies ever address it? Will he recover?
		
		
	 
Well. AoU addressed it. It was Cap's arc during the whole movie.
And judging by the deleted scene with Sharon, they've tried to touch it, Sharon was supposed to be his hope for the future, but something gone wrong about this scene. I actually think, the other posters were right - it seems that the scene was reshot due to the reaction of test audiences.
	
	
		
		
			Black Widow either gets arrested or she doesn't. She is convicted or she isn't. She is sentenced or she isn't. None of that is subjective.
You can argue whether what happens to her is bad or not, but all that happens to her is sitting through an inquest.
		
		
	 
I'm not arguing that the Russos did it all as it should have been done. I stress about it once again. I just speculate, why BW might have been more compelling 
to them personally and subjectively. They are humans. Their opinion about what is interesting is different from yours or mine. If you don't agree with them, it's totally fine, but it still doesn't mean they couldn't have deemed BW more interesting as a female lead due to this reasons.
	
	
		
		
			Did the Russos check with Whedon if he wanted to do a subplot about Natasha being on the run before deciding that her past made her better than Sharon?
		
		
	 
Did Shane Black check with Whedon if he wanted to do a subplot about Tony coming back to the Avengers after destroying all his suits and promising Pepper to retire?
	
	
		
		
			Scott Lang spent a lot of his own movie trying to go straight and avoid going back to prison, wanting to stay in his daughter's life. Did Whedon ignore that, or was it the Russos?
		
		
	 
Yeah, of course, it was the Russos.
I think, that's because they had no other way around it. They needed Scott to be there for Civil War. They needed more people. So they had no over way than to screw up his motivation.
	
	
		
		
			I haven't seen GotGv2, but
1) The main characters are still Starlord, Gamora, Drax, etc. Right? Gunn didn't put Captain Marvel front and center at their expense.
and 2)
Why not? I don't know a thing about those characters, but if their fans feel like they were squandered/mistreated and want to call Gunn out, they should go for it.
		
		
	 
I haven't read GotG comics, but too many people are saying that not only Mantis, but basically the majority of the Guardians are nothing like their comic-book counterparts. Even the creator of Mantis complained about this out loud. Is it better than what the Russos are doing if it's actually just new characters?
The thing is, I'm not saying fans of Sharon shouldn't call Russos out. I just think that the reason people name in this thread - the Russos being obsessed with the headliners - is too shallow and superficial to be true concerning good filmmakers. 
The point is, Cap is a headliner himself. So, even if they don't care much about Sharon herself they should care about the love interest of their most popular Avenger after IM. This is why I actually don't really believe your theory. They don't care much about Falcon, but it doesn't prevent them from at least depicting him properly and giving him screentime. They are not going out of their way to do it. They couldn't have been unaware that people would complain about Cap's LI not getting justice. This is why initially Sharon had a bigger role. They've perfectly understood why she needed to have a decent role.
So that's why I think there must be some other deeper reason, which is just not so obvious for us from the outside.
I've read a rumor on reddit that the original scene with Steve and T'Challa in Wakanda included Sharon too, but it she was eliminated from there. They cut her from this scene in reshoots. You can notice Sebastian's hair being a lot different in the movie and post credit scene. In the original version Bucky got his vibranium arm and not being put back on ice. 
And this is actually on par with what Minxie said about post-credit scene regarding Bucky.:
	
	
		
		
			It's curious because the post-credit scene was actually originally gonna be Bucky getting a new arm courtesy of T'Challa (I am 100% certain of this, it's not just a vague rumor I heard lol), but they re-shot the scene in the January re-shoots to what it is now. Idk if that means they changed their minds about how (or from who) Bucky will get a new arm, or if they decided to just put that scene in a different film.
		
		
	 
As those who read these threads back then know, Minxie had a legit source on the CW set.
So in case this rumor is true, it raises another whole problem: the Russos being not just "not caring about Sharon", but actively cutting her out. Sharon being in a post-credit in the background wouldn't have taken screentime from anybody and at least she wouldn't have completely vanished after the kiss.
You can't explain these actions by simple "They don't care about Sharon, they only care about the Avengers". This calls for some deeper reason we just don't know.
	
	
		
		
			....Fury has a connection with BW because that's how the final draft had it. 
They weren't depicted as close in The Avengers (I'm not sure they even talked to one another). Or Iron Man 2.
Why is it that the concept of scripts not being naturally-occurring things so alien?
		
		
	 
Well, I actually thought they were in IM2. Might be my mistake, I haven't rewatched IM2 for quite a long time.