I mean, the show is definitely entertaining, but you really have to wonder what is going in Isayama's head. He seams like a fucking genocidal Maniac. If this really is an analogy to Imperialist Japan, then you can safely say that Isayama is a damaged individual, who lacks historical Knowledge.
Regardless of that, I generally like the show and most of the cast. One of the better Animes of the last decade. Haven't read the last 5 chapters, because Eren is now going beyond mental and I don't see it stopping tbh. I think Isayama has written himself into a Cornern and the only way for it to end faithful to the plot, is for one side of the conflict to be entirely "genocided".
7/10 for me. Maybe better, if he can pull of a good ending, which I don't believe