I agree. I've read this for like 4 or 5 times and I still can't get over how low her eq is sometimes. She remembered her 2 lives. Her first life and her life as an orphan and a doctor which made her mellow out a bit.. true, her iq is that of a top surgeon in the modern world, but why can't her eq follow?
When she dropped that gun and looked really irritated and confused as to why she needed to learn how to shoot? Man... I had to take deep breaths and remind myself that maybe it's just teenage hormones and that common sense didn't follow and her mental age reverted back to that of a teenager.
In her first life, she understood the love of her family so she learned how to protect them. In this life, why couldn't she think that if SHE can worry for them, why can't THEY worry for her? Especially since, in their perception, she's just a 16 year old girl who hasn't even come of age yet?
An underage girl going to war and not even a trained soldier at that? If it wasn't for her being a protagonist, I'd say she's undermining the military and their health department that an underage girl like her would have to join the war, where people die all the time, as a doctor because none of them can do a better job than her (although it may be true, since she knows modern medicine) -- but that's it, why couldn't she think from that perspective and be single minded.