It doesn't hate children. It created content geared towards the most lucrative audience, which skews older, that's all. Batman in 1989 showed that superhero mo

It doesn't hate children. It created content geared towards the most lucrative audience, which skews older, that's all. Batman in 1989 showed that superhero movies could still be extremely popular & attract an older audience. It also sold so much merchandise-- consumed primarily by younger members of the audience-- that by the time the 4th movie "Batman & Robin" came around merchandise & its design was driving movie creation rather than quality content and the genre went into hiatus for a few years. When the genre reemerged with the 2002 Spiderman movie and subsequent hits & creation of the MCU, movie makers seemed to realize that they had to appeal to the older audience as well as those on the younger tween+ spectrum, even if it meant giving up ticket sales on for the youngest. And the extreme popularity of the movies made them enough of a cultural phenomenon that they still sell tons of merch to younger kids anyway.