I hear you, but you're exaggerating quite a bit.

Will some people be confused/turned off by the BP name? Yeah, but not enough to be significant. The interest it would generate from any "controversy" would probably be more positive than negative as far as box office returns, or at the least negate it. It's not that serious.

Ant-Man has been talked about for years, and Marvel has hesitated to make it because he's a shitty character. To me, they're taking a bigger risk making that movie than they'd be taking making BP. Now, it might turn it to be a decent movie in the hands of Edgar Wright, but it will likely be successful because everyone will know that it's part of the Avengers. Anything tied to the Avengers franchise is going to be at least somewhat successful.

To the average movie-goer all that black writer black director is just peripheral shit. It won't matter and they won't care (or even know) if the movie looks good.

And you're right, Marvel doesn't "owe" fans a BP movie. But fans aren't out of line when shitty characters nobody knows or cares about are getting stand alones and characters like BP (and others) aren't even getting mentioned anymore (or at all). THAT'S bullshit.