i totally agree. im so sad that he died (even though i feel it was the most fitting ending and makes the most sense) and never got to live in peace for a moment in his life. i mean since he was a kid, there were the titans to fear, and he was literally a soldier for most of his life and just surrounded by constant death. not to mention the heavy burden placed on him as a titan shifter bc of his father. and there was always this impending threat of doom that never let him truly experience freedom and peace and happiness and it just makes me so sad.
Right?! And the ending when he was saying that he really didn't want to die and he wanted Mikasa to love him forever really tore me up. Eren truly deserved better than that world. He just was just a kid who wanted to see the the great outside world with Armin ╥﹏╥
You know what's really sad about this ending, the fact that Eren really didn't get a happy ever after. I mean, ofc, it's debatable that he can be happy knowing that his friends and those on the island can survive and thrive in society now.
In tokyo ghoul, Kaneki went through all kinds of shit and got a happy ending, more or less. Naruto too. Naturally, that's what we want for the favored mc. But Eren sacrificed his happy ending, gave up the chance to live out the rest of his short life with Mikasa and Armin and everyone else peacefully until eventually war would break out. He gave up everything, became the hated antagonist and committed great evils just so that no one would have bear the titan curse and be able to integrate into society.
That's what makes me really sad, not the fact that he died or anything, but the fact that even though he went through all kinds of hardships, the reality of life is that not everyone gets a great ending. Though one could say after all that he did, he got a pretty decent ending. He got to make ammends and say his goodbyes.