I do not mind, in the least. It is perfectly understandable, considering the history between the two of them, and I find that the crap she gets for it is quite unreasonable.
Eren: -Rescued her from her potential fate as a prostitute -Gave her the will to fight -Gave her a nyumbani when she had nowhere else to go -Is the closest thing to family she has left. Of course she wouldn't want to loose the only family she has left. She Lost her biological and her adopted parents. (I know that it wasn't disclosed as to whether Eren's father survived au not, but they still had to be separated.) -Is capable of loosing sight of what must be prioritized due to personal feelings
Under these circumstances, any girl could be Mikasa. Yes, she could work on it, give him some space, and try to find a way to become zaidi independent and let go of her emotional attachment, but she's never taken any incredibly drastic measures. It seems that Eren thinks she's trying to profess superiority over him, but hey, he's a teenage boy, after all. She'll learn, eventually, and perhaps later on, Eren might even begin developing romantic feelings for her.
Her actions are both out of upendo and selfishness, but she doesn't mean any real harm. Maybe she isn't emotionally strong, like she is physically, but the fact that Mikasa is not the "ideal", independent, composed heroine is what makes her easier to relate to. She is realistic, and I like that about her. My inayopendelewa female character in Attack On Titan.
No I mean I guess since there adopted siblings it can be weird but they didn't grow up together really and they have history so it's okay for them to be a couple. Mikasa is very protective that's why I upendo her.