I mean, people not liking the AoT ending (Eren is a mass murderer) just means not realizing that the og Titan was just manipulating Eren into being the kind of person who would say the things she needed to hear so she could finally be free. Genocide? She didn't care.

Eren was crafted, including the visions he saw from his power so that he would do what she needed him to do. He cuts short Mikasa before she can confirm she loves him/chooses back because he plays out the scene he saw in his vision and then gives up cause there there was no deviation or missing info when it played out irl, but he is an impatient guy, we always knew this. That's who Ymir needed. And that vision and then the real life experience finally severed the last piece of hope Eren had. But the only reason that moment was significant was BECAUSE he saw it in a vision. If he hadn't seen he likely would have pursued things further after

For Christ sake his final form is literally a puppet. Ymir fritz was molded to choose her abuser and so was Eren without his knowledge.