https://www.tumblr.com/ilikekidsshows/821859177102196736/httpswwwtumblrcomilikekidsshows8217609074955
From a personal opinion standpoint, the 2010s was THE era of "we're airing just any old garbage." Like I personally hate Teen Titans Go and that aired in 2013. Adult Swim aired a lot of questionable, absurdist shows even before that. He could have pitched to companies that fit his vision, even if it didn't get prime time scheduling. He clearly doesn't actually care about the show if he's willing to compromise his entire creative vision to do so. People have sacrificed more to stop even "insignificant" changes. And that's not to say that show runners who care about their work and the story/message they want to tell and would rather get their shows cancelled abruptly than comprise anything for corporate greed and ""professionalism.""
He could have just shared the storyboards and waited for it to gain traction. Hell, people were out there creating short and long form content on Vine and Youtube with just themselves and a shitty phone camera; they were out there doing bare bones editing using jpgs of dolls from dress up games and making memes and entire series from handmade puppets and barbie dolls. Like I get wanting to have something you created to be seen as professional and created through traditional industry standards, but the fact that he's out here saying that he and his show are far and above anything made by amateurs is laughable.
I think that's exactly it. Astruc wanted Miraculous to become a professionally produced cartoon, no matter what, so he didn't even consider other options. But, the only way to get the series picked up was to convince broadcasters that the concept was bringing something new to the table, and we have a bunch of superhero shows for teens and up audiences. So they lied about the target audience. I repeat that Miraculous' suggested age in my home country used to be ages 4 and up, and Sébastien Thibaudeau later confirmed in an interview that he just straight up lied about the target audience to broadcasters.
But, like, I feel like those lies created an inferior product and left the people working on the project more dissatisfied. Because of the lies, they had to sneak in the things intended for an older audience and more serialized storytelling. But, when the series as a whole is just episodic slop, the end result is just BAD. Add in the fact that the writing team really isn't too good at writing, and they're trying to write something with layers, and the end result is a pile of steaming dogshit.
Although, I do have to say that networks were not airing just ANY slop. The thing about Teen Titans Go and the Powerpuff Girls sequel series is that they were wacky comedies with a superhero coat of paint. Cartoon Network had gotten VERY shy about airing superhero cartoons after The Green Lantern Animated Series and Young Justice attracted a girl audience, but Teen Titans Go and Powerpuff Girls weren't exactly that.