Point taken, I remember in the mid 2000s back when Paul Levitz ran DC, there were comics and animated series for kids and older audiences.It's the entire industry and that's why it's dying. Didio's idea that superheroes should never be happy is a big part of the reason these stories are no longer appropriate for kids.
Granted, his work was doing gangbusters with older / middle-aged men. But what are his plans to replace readers for them when they die off?
Though the concept of Superheroes being sad and unhappy is ridiculous.
It's possible to have Superhero stories that have drama and realistic issues but with some humor and emotional moments mixed in to even it out. That's what made the older comics and animated series so great.
Disney and Pixar have made it work for years. When they acquired Marvel for example, they took an already successful property and made it even more successful.
Still, whoever replaces Dan Didio just might be the change DC comics needs.