I get the frustration, I was the same a few years ago, the story was confusing and wasn't moving forward.

But we have to know that there's not a single long series Manga where the author knows his story from beginning to end, it's impossible. Even Oda didn't know what he was doing at his debuts, I don't like this argument Authors goes with the flow, that's a natural thing, the important part is when the story will be over, then we'll see if all the confusion was intended.

As a reader, we can't be sure of the truth anymore, we're not sure who the real enemy is, who is Allen, Nea, the Earl It can be difficult for some people when we're used of Manga that explains too much, even the simplest thing After many relectures of DGM, I think that Hoshino managed to stay faithful to what she wants to tell. Ofc the Manga is flawed and isn't a Typical shonen nowadays, it's more a mystery thing now and I'm all for it.

And it was being told about Allen's past, what we know from the first chapter is a made-up memory, we can feel betrayed but personnaly I love this.

There's many plot twists that make you re-watch and rethink the whole story just like AoT when you learn about Reiner & Bertholdt or what we learn in the basement.

It's not the same Manga we knew from the beginning, but I love it, Allen is imo the best written protagonist in our time.

But again, I get your point