I get it why so many people don't like how the story is going. I missed those first chapters, too that these kids just joined the military and we had so many questions and didn't know what's going on or what's beyond that wall. And we were just enjoying the friendship that was building up among these kids and how they were faceing the problems, and were finding their abilities, their values and uncovered some mysteries, but now Attack On Titan moved on soooo far from that, So many things happened, so many of our favorite characters died and so many more will die and we don't even recognize Eren anymore. I mean I know not many people liked him before as the protagonist, but he definitely became a complicated and interesting antagonist.
So I get it that Attack On Titan almost looks like something completely different from the beginning, but HOLY S••• Isayama has some huge balls to do this to his story and he actually is doing it GOOOOOOD! I'm still enjoying every second of it, and I don't believe there will be a happy ending for many of our favorites, but I trust him that much to know it will be the right and perfect ending.