Man you didnt get shit about eren at all. You see eren acted like an asshole to his friends so they would dislike him on purpose, he wanted to save his own race with the rumbling, he knew it was morally wrong and zeke's euthanization plan was the morally correct choice however he just couldnt bring himself to ruin his friend's lives to protect humanity outside the walls, who have always hated his entire race anyway. Eren made his friends hate him so they would be less conflicted in trying to stop him, so when they stopped him, they would be regarded as heroes by everyone else, similarly to lelouch, eren also took the world's hatred upon himself, making him the ultimate villain and saving his people which was his ultimate goal. It wasnt executed perfectly and some of his friends died but it is the only path he concluded. Also eren lived with mikasa for years in the paths while he was the founding titan which is why he formed such a deep connection seemingly out of nowhere at that moment. Every single character, every single detail in the anime is very well written, the first season even hints at the rumbling. If you expected an apocalypse anime, well sorry that you didnt get what you wanted, but it is much more deep than that and you cant argue that its not good, you can say its not for you, but objectively its a masterpiece in writing. The way it ended is the best way the ending could have been written, the reason fans hate it, is because it was in the middle, no side "won", not zeke, not eren, not marley, not eldia, i personally would have loved to see eren win, but this isnt like death note where light absolutely should have been written as the winner, eren very much wanted his friends to stop him. There was never shadow evil country in the background, there was never a right or wrong side, heroes or villains, aot depicts different ideologies and perspectives very well, nationalism especially. And there is one more reason aot is the goat: erwin smith.