The answer is pretty simple if you think about it. Feminism has destroyed masculinity. It has taken down the art of manhood piece by piece until what we are left with is men who are afraid to open doors for women lest they be berated by feminists. It has left us with guys who are so hesitant to do anything along the lines of gentleman behavior that they resort to crude humor to get attention Or, in efforts to be attractive and relate-able to a gender that pushes them away, guys start to be more and more feminine in words and action.
Portrayed on the big screen is a guy who is everything we want and nothing we normally see. A guy who is ready to fight for what is important and love the woman of their dreams, to the point of death (shout out to Captain America!) Yet, we know that our dreams and desire cannot really be fulfilled in these fictional characters Then what do we do about this dilemma? There are two parts to this solution.
The first is to encourage your little brothers. Well, your big brothers too. When their actions are commendable, and even when you can see that they are making an effort to act like a genuine guy, thank them. Let them know that you see it and appreciate it. All of us know that when we do something we deem worthy of recognition only to have no one say anything about it, the action becomes less desirable to do. When a guy offers his seat to you, thank him. Same for when he holds the door. I was surprised at school this week have a guy looked at me with a shocked expression when I thanked him for holding the door. I don't believe that it is a common practice (both the holding and the thanking.) Make an effort when they make an effort.
Will it be an overnight culture change. NO. That is a guaranteed no. Yet is it possible? Perhaps it will start small at first. An appreciation of the gender-based characteristics of masculinity and femininity? Let's just say Matthew 19:26 and we'll leave it at that.