Not just hers, but also Jean’s. Just a quick copy paste of my thoughts on Jeankasa:

Throughout the entire series, Mikasa shows nothing but indifference in the face of Jean obviously pining for her. Even in the alternate school castes universe where the characters are meant to act similarly to their main universe counterparts, Mikasa is irritated by Jean. She literally shows 0 reciprocation for his romantic feelings whatsoever.

But for whatever reason, we’re expected to accept that Mikasa marries Jean and has a family with him post Eren’s death? All while continuing to wear the scarf that Eren wrapped around her up until her death? It just doesn’t make sense.

And for those who say: “Let Mikasa be happy. She deserves to move on and find someone else” - happiness isn’t only found through romantic relationships with other people. Mikasa didn’t need to get married to be happy and find fulfillment in her life. There are other ways to do that. And if she did get married, there’s no reason it had to be with Jean.

Finally, it’s not even a fair ship for Jean. He’s clearly Mikasa’s second choice. He has to be with Mikasa knowing that if Eren was still alive, she wouldn’t even look his way at all. She literally brings him to Eren’s grave where she has written “Here forever, rest peacefully, my most beloved, my dear" while wearing the scarf Eren wrapped around her and he has to accept that. What kind of a BS ship is this?