.redro gnorw eht yletelpmoc ni tub ,pihsnoitaler thgir eht evah uoY
No, media does not influence us, we create it. It reflects who we already are as a society. Nobody neutral watches Fox news and turns conservative, they watch Fox news because they're already conservatives. Teenagers don't become Satanists by listing it heavy metal, they listen to heavy metal because those are the lyrics that speak to their anger and dissatisfaction with the world. Hollywood didn't wake up one day, lose their collective mind and decide to desensitize people to violence. Hollywood woke up one day, looked as a spreadsheet and saw the box office returns of violent movies and thought "hey!! people love this shit, let's make more!!"
Superhero movies are popular because that's what people want. They feel powerless, they feel downtrodden and they feel like one side of the country is taking advantage of them to help the foreigners and criminals and that they other side of the country is taking advantage of them to help the rich and powerful. Superheroes are the wish fulfillment of people who want to be the superhero. They WANT to be the person that sets things right. They WANT to be the one throwing the bus. They WANT to be able to influence the world around them and shape it the way they they think it should be. And they can't. It's not news that Superheroes were always most popular with the people that felt the most powerless. The chess team and math club dorks and the girls who felt invisible because they were not into clothes and makeup were tired of being viewed as weaklings and outsiders and hated being picked on the the more physically powerful or the more popular. They view superheroes as their champions, their better selves, who they got bitten by a radioactive spider and gained super powers. Well EVERYBODY feels that way now.